A 25 year old infertile male underwent semen analysis.Results show:sperm count - 15 million/ml;pH-7.5;volume-2ml;no agglutination is seen.Morphology shows 60% normal and 60% motile sperms.Most likely diagnosis is:

• A. Oligospermia
• B. Normospermia
• C. Aspermia
• D. Azoospermia