Here's a short story:

The economy of Himachal Pradesh is currently the third-fastest growing economy in India.[citation needed] Himachal Pradesh has been ranked fourth in the list of the highest per capita incomes of Indian states. This has made it one of the wealthiest places in the entire South Asia. Abundance of perennial rivers enables Himachal to sell hydroelectricity to other states such as Delhi, Punjab, and Rajasthan. The economy of the state is highly dependent on three sources: hydroelectric power, tourism, and agriculture.[citation needed] 

After independence, the Chief Commissioner's Province of H.P. came into being on 15 April 1948 as a result of integration of 28 petty princely states (including feudal princes and zaildars) in the promontories of the western Himalaya, known in full as the Simla Hills States and four Punjab southern hill states by issue of the Himachal Pradesh (Administration) Order, 1948 under Sections 3 and 4 of the Extra-Provincial Jurisdiction Act, 1947 (later renamed as the Foreign Jurisdiction Act, 1947 vide A.O. of 1950). The State of Bilaspur was merged in the Himachal Pradesh on 1 April 1954 by the Himachal Pradesh and Bilaspur (New State) Act, 1954. Himachal became a part C state on 26 January 1950 with the implementation of the Constitution of India and the Lt. Governor was appointed. Legislative Assembly was elected in 1952. Himachal Pradesh became a union territory on 1 November 1956. Following area of Punjab State namely Simla, Kangra, Kulu and Lahul and Spiti Districts, Nalagarh tehsil of Ambala District, Lohara, Amb and Una kanungo circles, some area of Santokhgarh kanungo circle and some other specified area of Una tehsil of Hoshiarpur District besides some parts of Dhar Kalan Kanungo circle of Pathankot tehsil of Gurdaspur District; were merged with Himachal Pradesh on 1 November 1966 on enactment of Punjab Reorganisation Act, 1966 by the Parliament. On 18 December 1970, the State of Himachal Pradesh Act was passed by Parliament and the new state came into being on 25 January 1971. Thus Himachal emerged as the 18th state of the Indian Union. (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: Who has the third fastest growing economy in India?
Guess: Himachal Pradesh
Confidence: <appropriate level of confidence in this guess>

Question: Where does it rank in per capita income?
Guess: 4th
Confidence: <appropriate level of confidence in this guess>

Question: What are the three main industries supporting the economy there?
Guess: hydroelectric power, tourism, and agriculture
Confidence: <appropriate level of confidence in this guess>

Question: Why does it have such a strong hydroelectric economy?
Guess: Many rivers
Confidence: <appropriate level of confidence in this guess>

Question: where do they export the electricty to?
Guess: other states
Confidence: <appropriate level of confidence in this guess>

Question: which ones?
Guess: Delhi, Punjab, and Rajasthan
Confidence: <appropriate level of confidence in this guess>

Question: How many petty princely states were absorbed into Himachal?
Guess: Twenty eight
Confidence: <appropriate level of confidence in this guess>

Question: What year was that?
Guess: 1848
Confidence: <appropriate level of confidence in this guess>

Question: are you sure?
Guess: 1948
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: when did it become a C state?

26 January 1950