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: Gynaecology & Obstetrics
Gonadal sex of the fetus is determined by : 
Select and explain. 
A. Secretion of testosterone, B. Secretion of antimullerian hormones, C. Sex determining region on the 'Y' chromosome, D. Secretion of estrogen
C: Sex determining region on the 'Y' chromosome
Answer: C: Sex determining region on the 'Y' chromosome 
Explanation: Sex determining region on the 'Y' chromosome