This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Gender of the fetus is first evident by what gestational age (weeks) ? NOT RELATED - GYN 
Select and explain. 
A. 6, B. 8, C. 12, D. 16
C: 12
Answer: C: 12 
Explanation: .