This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Normal pH of human semen 
Select and explain. 
A. 7, B. 7.2, C. 7.4, D. 7.8
C: 7.4
Answer: C: 7.4 
Explanation: Normal pH range of semen is: 7.35-7.50Ref: Ganong Review to medical physiology edition. 23 pg No:405