This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology in Relation to Reproduction, Subject name: Gynaecology & Obstetrics
Ovulation occurs after the extrusion of: 
Select and explain. 
A. Primary oocyte, B. Female pronucleus, C. lstpolar body, D. 2nd polar body
C: lstpolar body
Answer: C: lstpolar body 
Explanation: Ans. (c) 1st polar bodyRef.: D.C. Dutta 8th ed. / 21-22, 8th ed. / 21, 7th ed./17,19