The menstrual cycle is regulated by two hormones secreted from the pituitarygland, follicle stimulating hormone (FSH<span>) and luteinizing hormone (LH).</span>
The answer is B) Chromosomes
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<u>Appropriate</u><u> </u><u>Answer</u><u>:</u></h3>

Nucleus is the control centre of the cell and manages all the cellular activities taking place inside the cell. It consists of four parts :-
- Nuclear membrane,
- Nucleoplasm,
- Chromatin material and
- Nucleolus.
The Chromatin material(Condensed - Chromosome) stores the cell's DNA which is transmitted to next generation.
During Meiosis, Cell divides "Twice" (2 times )
Hope this helps!