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
A 25 year old infertile male underwent semen analysis. Results show: sperm count - 15 million/ ml; pH - 7.5; volume - 2 ml; no agglutination is seen. Morphology shows 60% normal and 60% motile sperms. Most likely diagnosis is:a) Normospermiab) Oligospermiac) Azoospermiad) Aspermia 
Select and explain. 
A. ac, B. ab, C. ad, D. bc
B: ab
Answer: B: ab 
Explanation: The semen analysis of the patient shows: