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: Pathology
Which of the following production is noted in Cushing's Syndrome 
Select and explain. 
A. Decrease production of cortisol, B. Increase production of cortisol, C. Excessive production of epinephrine, D. Excessive production of vasopressin
B: Increase production of cortisol
Answer: B: Increase production of cortisol 
Explanation: Cushing syndrome

Cushing syndrome is characterized by an excess production of cortisol.
The most common cause of Cushing syndrome is exogenous hypercortisolism, i.e., administration of exogenous glucocorticoids.
The cause of endogenous hypercortisolism (endogenous Cushing syndrome) are : -

i)    ACTH producing pituitary microadenoma →
It is the most common cause of endogenous hypercortisolism and this form of Cushing syndrome is referred to as Cushing disease.
ii) Hypersecretion of cortisol by an adrenal adenoma, carcinoma or nodular hyperplasia.
iii) The secretion of ectopic ACTH by a nonendocrine neoplasm, e.g., small cell carcinoma of the lung.