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A man whose vas deferens are cut and tied cannot father a child because:
Answer & Solution
Correct answer: A.
1. Vasectomy ligates and cuts the vas deferens.
2. Sperm produced in the testis can no longer travel up the duct system.
3. Sperm production continues, but the ejaculate carries no sperm.
_Source: NCERT Class 10 Science, Ch 7 "How do Organisms Reproduce", §7.3.3_
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