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The figure shows a section of human ovary. Select the option which gives the correct identification of A and B with function/characteristic.

1. A – Primary oocyte – it is the prophase – I of the meiotic division
2. B – Corpus luteum – secretes progesterone
3. C – Tertiary follicle – forms Graafian follicle
4. D – B – Corpus luteum – secretes estrogen

Correct answer: B – Corpus luteum – secretes progesterone

Solution

The corpus luteum forms from the ruptured follicle after ovulation and functions as a temporary endocrine gland. Its main hormone is progesterone, which helps maintain the endometrium for possible implantation.

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