This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Which drug is essential in Sheehan's syndrome: 
Select and explain. 
A. Estrogen, B. Coisone, C. Thyroxin, D. Growth hormone
B: Coisone
Answer: B: Coisone 
Explanation: Answer is B (Coisone): "Multiple hormones must be replaced in patients with pan-hypopituitarism, but coisol replacement is most impoant"(2 - Harrison 14th /1994 Sheehan's syndrome is post-paum infarction of the pituitary, leading to hypopituitarism. Treatment consists of hormone replacement therapy including Glucocoicoids, Thyroid hormone, Sex steroids, Growth hormone, Vasopressin, etc. Thus, multiple hormones must be replaced, but remember that Coisol replacement is most impoant.