NEET 2017 · Class 12

Reproductive Health

The function of copper ions in copper releasing IUD's is :

  1. (A)They inhibit gametogenesis
  2. (B)They make uterus unsuitable for implantation
  3. (C)They inhibit ovulation
  4. (D)They suppress sperm motility and fertilising capacity of sperms

The NCERT line that answers it

Verbatim line

IUDs increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilising capacity of sperms.

Chapter
Reproductive Health
Section
3.2 POPULATION STABILISATION AND BIRTH CONTROL
Page
3
Words matched
22 of 22

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'Cu ions released suppress sperm motility and the fertilising capacity of sperms', which directly matches option D and distinguishes it from other options.

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Question text is reproduced from the published NEET 2017 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.