Q.

Which of the following is the primary sex organ in man?

A. Prostrate
B. Testis
C. Vas defences
D. Seminal vesicles
Answer» B. Testis
Explanation: In the case of male reproductive system the primary sex organs are a pair of testes lying outside the abdominal cavity, enclosed in a sac called the scrotum.
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Biology (GK)

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