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: Anatomy
Normal sperm count is: 
Select and explain. 
A. 20 million per ml, B. 40 million per ejaculate, C. Both, D. None
C: Both
Answer: C: Both 
Explanation: Some important points regarding spermatogenesis

Sperms are produced in: seminiferous tubules in testes
Sertoli cells nurture the developing sperms
Time for spermatogenesis: 64 days (Thymidine labelling records say it is 74 days)
Normal sperm count: 20 million per ml or 40 million per ejaculate
Infertility is considered with a sperm count of less than 15 million sperms/ml
Fructose is the main source of energy for sperms
Prostaglandins suppress immune response against sperms in the female reproductive tract
Zinc serves to help to stabilize the DNA-containing chromatin in the sperm cells
Acrosomal cap houses the various enzymes needed to penetrate the zona pellucida of the oocyte.