This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
LH is secreted by 
Select and explain. 
A. Ovary, B. Pituitary, C. Corpus luteum, D. Hypothalamus
B: Pituitary
Answer: B: Pituitary 
Explanation: Luteinizing hormone (LH, also known as lutropin and sometimes lutrophin is a hormone produced by gonadotropic cells in the anterior pituitary gland. In females, an acute rise of LH ("LH surge") triggers ovulation and development of the corpus luteum. In males, where LH had also been called interstitial cell-stimulating hormone (ICSH), it stimulates Leydig cell production of testosterone. It acts synergistically with FSH.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-304