Given above is an incomplete flow chart showing influence of hormones on gametogenesis in males. Observe the flow chart carefully and identify A, B and C.

A-Progesterone, B-Follicular, C-Spermatogenesis

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A-GnRH, B-Follicular, C-Spermatogenesis

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A-GnRH, B-Sertoli , C-Spermatogenesis

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A-Androgens, B-Sertoli , C-Spermatogenesis

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Solution

The correct option is D A-Androgens, B-Sertoli , C-Spermatogenesis
Spermatogenesis results with a significant increase in the secretion of Gonadotropin-releasing hormone (GnRH). This further stimulates the secretion of LH and FSH (Luteinising hormone and Follicle stimulating hormone respectively. LH acts at the Leydig cells and stimulates synthesis and secretion of androgens. On the other hand, FSH acts on the Sertoli cells and further enhances spermatogenesis.
So, the correct option is 'A-Androgens, B-Sertoli, C-Spermatogenesis'.

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