Read the following sentences and select the correct option with all true statements.
i. During parturition , oxytocin induces intense contractions in the uterus.
ii. After parturition oxytocin stimulates milk ejection.
iii . The labour pain of during child-birth is due to oxytocin .
iv. oxytocin is secreted from placenta and ovary .

Options

A. Statement i, ii, and iv
B. Statement i, ii, and iii
C. Statement iii and iv
D. Statement i and iii

Answer

To solve the question, we need to evaluate each of the provided statements regarding oxytocin and determine which ones are true.

### Step-by-Step Solution:

1. **Evaluate Statement i**: "During parturition, oxytocin induces intense contractions in the uterus."
- **Analysis**: This statement is true. Oxytocin is known to stimulate uterine contractions during childbirth (parturition).

2. **Evaluate Statement ii**: "After parturition, oxytocin stimulates milk ejection."
- **Analysis**: This statement is also true. After childbirth, oxytocin plays a crucial role in the milk ejection reflex during breastfeeding.

3. **Evaluate Statement iii**: "The labour pain during child-birth is due to oxytocin."
- **Analysis**: This statement is true as well. The contractions induced by oxytocin during labor contribute to labor pain.

4. **Evaluate Statement iv**: "Oxytocin is secreted from placenta and ovary."
- **Analysis**: This statement is false. Oxytocin is primarily secreted by the posterior pituitary gland, not the placenta or ovary.

### Conclusion:
Based on the evaluations:
- Statements i, ii, and iii are true.
- Statement iv is false.

The correct option with all true statements is the one that includes statements i, ii, and iii.

### Final Answer:
The correct option is the one that includes statements i, ii, and iii.

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