A 26 year old woman being treated for a carcinoma of the bronchus with steroids presents with vomiting, abdominal pain and sudden falls in the morning. What is the most specific cause for her symptoms?

The key is C. Adrenal insufficiency. [Patients on steroid develop suppression of hypothalamic pituitary adrenal axis and frequently may lead to adrenal insufficiency (here vomiting, abdominal pain and sudden falls in the morning secondary to postural hypotension on getting up from bed points towards the diagnosis of adrenal insufficiency)].