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Assertion (A): Reflex actions… (Class 10 Science 2026, Q8)

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ScienceCBSE Class 10 · Board exam 2026, set 31/1/1 · 1 mark · Assertion-reason

CBSE Class 10 Science 2026: question 8

Set in the CBSE Class 10 board exam of 2026, paper 31/1/1, section A, question 8, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q8 · 1 mark · Assertion-reasonCompetency-basedControl and Coordination

Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

  1. (A)Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
  2. (B)Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
  3. (C)Assertion (A) is true, but Reason (R) is false.
  4. (D)Assertion (A) is false, but Reason (R) is true.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Recall the path of a reflex arc.

Hint 2

Does the impulse need to reach the cerebrum?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Assertion: a reflex action is a quick, automatic response, so it happens without conscious thinking. True.

  2. Reason: most reflex arcs pass through the spinal cord, which sends the response directly without involving the thinking part of the brain. True, and this explains why no thinking is involved. Correct option: (A).

    1 mark

Answer: (A)

Where the marks are

  • Both statements true, R explains A, option (A) (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Control and Coordination, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 31/1/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.