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
Testing for microdeletion of Y-chromosome is offered for which patient with a normal Karyotype 
Select and explain. 
A. Sperm concentration of 2 million/ml, B. Semen volume of 2 ml, C. Presence of fructose in semen, D. Normal morphology sperms >4%
A: Sperm concentration of 2 million/ml
Answer: A: Sperm concentration of 2 million/ml 
Explanation: A patient with severely decreased sperm counts and a normal Karyotype is offered testing for microdeletion of Y chromosome.