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At 14th day of normal human menstrual cycle rapid secretion of LH normally occurs.

1. (a) At 14th day of normal human menstrual cycle rapid secretion of LH normally occurs.
2. (b) In Oogenesis, the second maturation division occurs until after the ovum has been penetrated by a sperm.
3. (c) Oogenesis involves the formation of haploid female gametes, ova from diploid egg mother cells.
4. (d) Oogonia of ovary of female organism.

Correct answer: (a) At 14th day of normal human menstrual cycle rapid secretion of LH normally occurs.

Solution

The correct statement is the one describing the LH surge, which normally happens around day 14 of a 28-day menstrual cycle and triggers ovulation. The other options discuss oogenesis, but they do not identify this specific mid-cycle hormonal event.

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