NEET 1996 · Class 11

Photosynthesis in Higher Plants

'The law of limiting factors' was proposed by

  1. (A)Leibig
  2. (B)Hatch and Slack
  3. (C)Blackman
  4. (D)Arnon

The NCERT line that answers it

Verbatim line

When several factors affect any [bio] chemical process, Blackman's (1905) **Law of Limiting Factors** comes into effect.

Chapter
Photosynthesis in Higher Plants
Section
11.10 FACTORS AFFECTING PHOTOSYNTHESIS

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 'Blackman's (1905) Law of Limiting Factors', which directly and conclusively identifies Blackman as the proposer of the law, matching the correct answer option C.

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.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 1996 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.