Re-NEET 2026 · Question 173 · Class 12

Human Reproduction

The covering of ovum at ovulation is ________.

  1. (A)endometrium
  2. (B)zona radiata
  3. (C)zona pellucida
  4. (D)chorion

The NCERT line that answers it

Verbatim line

During fertilisation, a sperm comes in contact with the *zona pellucida* layer of the ovum (Figure 2.10) and induces changes in the membrane that block the entry of additional sperms.

Chapter
Human Reproduction
Section
2.5 FERTILISATION AND IMPLANTATION
Page
9
Words matched
30 of 30

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

How this line gives the answer

0, emb=0.9442, combined=0.9665). Verified: high — The span explicitly states that the zona pellucida is a layer of the ovum, which directly identifies it as the covering at ovulation, and the other options are not mentioned as such.

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Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

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Question text is reproduced from the published Re-NEET 2026 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.