NEET 2017 · Class 11

Plant Growth and Development

Fruit and leaf drop at early stages can be prevented by the application of

  1. (A)ethylene
  2. (B)auxins
  3. (C)gibberellic acid
  4. (D)cytokinins

The NCERT line that answers it

Verbatim line

They help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits.

Chapter
Plant Growth and Development
Section
13.4.3 Physiological Effects of Plant Growth Regulators
Page
9
Words matched
21 of 21

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 'They help to prevent fruit and leaf drop at early stages' and refers to auxins from the preceding context, directly matching the MCQ's correct answer.

We did this for 1,565 questions.

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.

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.