Read the statements given below :
(i) The first movements of the foetus and appearance of hair on the head are usually observed during 5th months of pregnancy.
(ii) The structural and functional unit between developing embryo and the maternal body is called the umbilical cord .
(iii) At puberty , in female both ovaries contain about 60,000 –80,000 primary follicles .
Choose the correct statement from the above .

Options

A. i, ii, and iii
B. i and ii
C. ii and ii
D. only i

Answer

To solve the question, we will evaluate each of the three statements provided and determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**:
- The statement claims that the first movements of the fetus and the appearance of hair on the head are usually observed during the 5th month of pregnancy.
- **Analysis**: This statement is correct. During the 5th month of gestation, fetal movements (often referred to as "quickening") can be felt by the mother, and hair begins to appear on the fetus's head.

2. **Evaluate Statement (ii)**:
- The statement claims that the structural and functional unit between the developing embryo and the maternal body is called the umbilical cord.
- **Analysis**: This statement is incorrect. The correct term for the structural and functional unit that facilitates the exchange of nutrients, gases, and waste between the mother and the embryo is the placenta. The umbilical cord connects the fetus to the placenta but does not serve as the primary interface.

3. **Evaluate Statement (iii)**:
- The statement claims that at puberty, in females, both ovaries contain about 60,000 to 80,000 primary follicles.
- **Analysis**: This statement is misleading. Each ovary contains approximately 60,000 to 80,000 primary follicles, meaning that together, both ovaries would contain around 120,000 to 160,000 primary follicles. Therefore, this statement is incorrect.

### Conclusion:
- From the analysis, we find that:
- Statement (i) is correct.
- Statement (ii) is incorrect.
- Statement (iii) is incorrect.

Thus, the correct answer is that only statement (i) is true.

### Final Answer:
The correct statement is (i) only.

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