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Select the option that shows… (Class 12 Biology 2026, Q3)

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BiologyCBSE Class 12 · Board exam 2026, set 57/1/1 · 1 mark · MCQ

CBSE Class 12 Biology 2026: question 3

Set in the CBSE Class 12 board exam of 2026, paper 57/1/1, section A, question 3, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q3 · 1 mark · MCQHuman Reproduction

Select the option that shows correct statements :
(i) Corpus luteum secretes progesterone.
(ii) Only FSH attains a peak level in middle of cycle.
(iii) LH surge induces rupture of graafian follicle.
(iv) Luteal phase of menstrual cycle is also called proliferative phase.

  1. (A)Only (ii) is correct.
  2. (B)(i) and (iii) are correct.
  3. (C)Only (iv) is correct.
  4. (D)(ii) and (iv) are correct.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 57/1/1.

Hints

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

Hint 1

Check which hormones peak at mid-cycle.

Hint 2

The proliferative phase is the follicular phase.

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. (i) is true: the corpus luteum secretes progesterone. (iii) is true: the mid-cycle LH surge causes ovulation.

    ½ mark

  2. (ii) is false because both LH and FSH peak at mid-cycle. (iv) is false because the luteal phase is the secretory phase, not the proliferative phase.

    ½ mark

Answer: (B) (i) and (iii) are correct

Where the marks are

  • Selects option B (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Human Reproduction, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 57/1/1: 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.