Read the following statements carefully :-
I. Menstrual cycle occur in human beings only.
II. Menstruation only accurs if the released ovum is fertilized.
III. Both LH and FSH attain a peak level in the middle of mentrual cycle.
IV. Corpus luteum is degenerated in the absence of fertilization.
V. The first menstruation occurs just before puberty is called menarche.
Choose the true and false statements:

Options

A. I - False II - False III - False IV - True V - True
B. I - False II - True III - True IV - False V - False
C. I - True II - True III - False IV - False V - True
D. I - False II - False III - True IV - True V - False

Answer

To determine the truthfulness of the given statements regarding the menstrual cycle, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement I: "Menstrual cycle occurs in human beings only."**
- This statement is **false**. The menstrual cycle is not exclusive to humans; it also occurs in other female primates, such as chimpanzees and monkeys.

2. **Statement II: "Menstruation only occurs if the released ovum is fertilized."**
- This statement is **false**. Menstruation occurs when the ovum is not fertilized. If fertilization does not take place, the uterine lining is shed, leading to menstruation.

3. **Statement III: "Both LH and FSH attain a peak level in the middle of the menstrual cycle."**
- This statement is **true**. Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) do peak around the middle of the menstrual cycle, particularly during ovulation.

4. **Statement IV: "Corpus luteum is degenerated in the absence of fertilization."**
- This statement is **true**. If fertilization does not occur, the corpus luteum, which forms from the remnants of the follicle after ovulation, will degenerate.

5. **Statement V: "The first menstruation occurs just before puberty is called menarche."**
- This statement is **false**. Menarche is the first menstruation, but it occurs at the onset of puberty, not before it.

### Summary of True and False Statements:
- **Statement I:** False
- **Statement II:** False
- **Statement III:** True
- **Statement IV:** True
- **Statement V:** False

### Final Answer:
- True Statements: III, IV
- False Statements: I, II, V