Surgical methods of contraception prevent:
Gamete formation
Gamete motility
Both (1) and (2)
Spermatogenesis only
surgical methods (sterilisation) work by blocking gamete transport and thereby preventing conception. They do not prevent gamete formation or spermatogenesis. (Note: While Option 2 'Gamete motility' is the closest distractor provided in the raw input, the strict NCERT term is 'gamete transport' ).
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