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The figure shows a longitudinal section of the testis. Inside each seminiferous tubule, the cells that provide **nutrition** to developing sperms are: 
ASpermatogonia
BSertoli (sustentacular) cells
CInterstitial (Leydig) cells
DPrimary spermatocytes
Answer & Solution
Correct answer: B. Sertoli (sustentacular) cells
Sertoli cells (large pyramidal cells inside the seminiferous tubule) anchor and nourish the developing sperm. Spermatogonia/primary spermatocytes are the germ cells themselves. Leydig cells lie **between** tubules and secrete testosterone — they don't nourish sperms.
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