Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.
(i) The expulsion of completely developed fetus from the uterus is known as ovulation.
(ii) The sex of the baby will depend on which sperm fertilises the ovum.
(iii) Estrogen is released by testes at the onset of puberty.
(iv) The embryo attaches to the wall of uterus by placenta.

Options

A. `{:("(i)","(ii)","(iii)","(iv)"),(T,F,T,F):}`
B. `{:("(i)","(ii)","(iii)","(iv)"),(T,F,F,F):}`
C. `{:("(i)","(ii)","(iii)","(iv)"),(F,T,F,T):}`
D. `{:("(i)","(ii)","(iii)","(iv)"),(T,T,F,T):}`

Explanation

To solve the question, we need to evaluate each statement one by one and determine whether they are true (T) or false (F).

1. **Statement (i)**: "The expulsion of completely developed fetus from the uterus is known as ovulation."
- **Analysis**: This statement is false. The process of expelling a fully developed fetus from the uterus is called parturition, not ovulation. Ovulation refers to the release of a mature ovum from the ovary.
- **Conclusion**: **False (F)**

2. **Statement (ii)**: "The sex of the baby will depend on which sperm fertilises the ovum."
- **Analysis**: This statement is true. The sex of the baby is determined by the type of sperm that fertilizes the ovum. Sperm can carry either an X or a Y chromosome, while the ovum carries an X chromosome. If a sperm with a Y chromosome fertilizes the ovum, the baby will be male (XY). If a sperm with an X chromosome fertilizes the ovum, the baby will be female (XX).
- **Conclusion**: **True (T)**

3. **Statement (iii)**: "Estrogen is released by testes at the onset of puberty."
- **Analysis**: This statement is false. Estrogen is primarily a female hormone produced by the ovaries. In males, testosterone is the primary hormone released by the testes at puberty, not estrogen.
- **Conclusion**: **False (F)**

4. **Statement (iv)**: "The embryo attaches to the wall of the uterus by placenta."
- **Analysis**: This statement is true. The embryo does attach to the uterine wall through the placenta, which facilitates nutrient and gas exchange between the mother and the developing fetus.
- **Conclusion**: **True (T)**

### Final Evaluation of Statements:
- Statement (i): **False (F)**
- Statement (ii): **True (T)**
- Statement (iii): **False (F)**
- Statement (iv): **True (T)**

### Summary of Results:
- (i) F
- (ii) T
- (iii) F
- (iv) T

### Correct Option:
The correct option that identifies the true (T) and false (F) statements is **Option 3**: (i) F, (ii) T, (iii) F, (iv) T.

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