<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 45 year-old gentleman presents to his primary care physician complaining of wrist pain and is diagnosed with carpal tunnel syndrome. Upon further questioning, the patient admits that he has recently been outgrowing his gloves and shoes and has had to purchase a new hat as well due to increased head size. Upon exam, he is found to have new mild hypertension and on basic labs he is found to be hyperglycemic. Which of the following is the best blood test to diagnose his suspected disorder?? A: Hydroxyproline level, B: Alkaline Phosphatase level, C: Cortisol level, D: Growth Hormone level, E: IGF-1 level,  <response>: The patient is a 45 year old man who is presenting with symptoms of carpal tunnel syndrome, increased head size requiring new hats, mild hypertension, and hyperglycemia. The key findings are increased head size, hand size, and shoe size, suggesting the patient may have acromegaly caused by excess growth hormone. Acromegaly classically causes enlargement of the extremities and facial features due to excess growth hormone production, usually from a pituitary tumor. This leads to increased levels of insulin-like growth factor 1 IGF-1. Therefore, the best diagnostic blood test would be to check the IGF-1 level.E: IGF-1 level 