This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Medicine
A 26 year old female after her delivery develops features of headache, nausea, visual complaints, fatigue. What is the most probable diagnosis? 
Select and explain. 
A. Hyperprolactinemia, B. Sheehan's syndrome, C. Water hose Fredricksson syndrome, D. Pituitary adenoma
B: Sheehan's syndrome
Answer: B: Sheehan's syndrome 
Explanation: Sheehan's syndrome: Postpaum haemorrhage - Pituitary damage -Secondary Addison's disease- Reduced ACTH- Reduced coisol - Hypoglycaemia. B.P is normal as aldosterone is not affected No hyperpigmentation as ACTH levels are low Rx-Dexamethasone