<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A multicentric, ambidirectional cohort study i.e. a study that combines elements of both prospective and retrospective cohort studies was designed in order to evaluate the relationship between nasal colonization with methicillin-resistant Staphylococcus aureus MRSA and exposure to patients in intensive-care units of several tertiary hospital centers. The sample included 1,000 physicians who worked in the hospital environment and who willingly underwent swabbing of their nasal vestibule and nasopharynx for active surveillance. Data of their working location was obtained from hospital administrative services. Of those who worked in the intensive care unit, 350 were colonized with MRSA, while 250 were not. Whereas in those that worked in other hospital wards, 100 were colonized with MRSA, and 300 were not. What is the relative risk of MRSA colonization in relation to working in the intensive-care unit?? A: 0.18, B: 0.43, C: 1.66, D: 2.33, E: 3.22,  <response>: This is a relative risk calculation question. To calculate the relative risk, we need to look at the 2x2 table comparing MRSA colonization among those working in the ICU versus those working in other wards. From the information provided, we can construct the following 2x2 table:ICU: MRSA 350 MRSA- 250Other: MRSA 100 MRSA- 300 Relative risk is calculated as the risk of the outcome in the exposed group divided by the risk of the outcome in the unexposed group.Risk in ICU exposed 350600 0.583Risk in Other unexposed 100400 0.25Relative risk Risk in Exposed Risk in Unexposed 0.583 0.25 2.33D: 2.33 