According to Darwin, the organic evolution is due to

(A)competition within closely related species
(B)reduced feeding efficiency in one species due to the presence of interfering species
(C)intraspecific competition
(D)interspecific competition

The NCERT line that answers it

Verbatim line

When Darwin spoke of the struggle for existence and survival of the fittest in nature, he was convinced that interspecific competition is a potent force in organic evolution.

Chapter: Organisms and Populations
Section: 11.1.4 Population Interactions
Page: 10
Words matched: 28 of 28

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 'Darwin was convinced that interspecific competition is a potent force in organic evolution,' which directly matches the MCQ's correct answer and distinguishes it from intraspecific competition.

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 check More from this chapter

Question text is reproduced from the published NEET 2013 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.