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Match List-I with List-II with respect to the methods of contraception and their respective actions.
List I List II
A Vaults I They alter the quality of cervical mucus to retard entry of sperms
B Oral contraceptive pills II Ejaculated semen would not enter into the female reproductive tract
C Sterilisation III They cover the cervix blocking the entry of sperms
D Nirodh IV Surgical intervention blocks gamete transport
Select the correct option.
A B C D
1. I III IV II
2. III I II IV
3. I II III IV
4. III I IV II

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answer is D.

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Detailed Solution

A-III	Vaults cover the cervix blocking the entry of sperm.
B-I	Oral contraceptive pills alter the quality of cervical mucus to retard entry of sperm.
C-IV	Sterilisation methods block gamete transport.
D-II	Nirodh prevents the entry of the ejaculated semen into the female reproductive tract.

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