Read the following statements with respect to vernalization and select the correct choice.
A. Promotes precocious reproductive development late in growing season.
B. Inhibits vegetative growth.
C. Prevents precocious reproductive development early in growing season.
D. Promotes flowering by period of low temperature inn biennial plants.

Options

A. Only D is incorrect
B. A, B & D are incorrect
C. Only D is correct
D. A, C & D are correct

Answer

To solve the question regarding vernalization, we will analyze each statement provided and determine which one is correct based on the principles of vernalization.

### Step-by-Step Solution:

1. **Understanding Vernalization**:
Vernalization is the process by which flowering is induced in plants by exposing them to a prolonged period of cold temperatures. This is particularly important for biennial plants, which require a cold period to transition from vegetative growth to flowering.

2. **Analyzing Statement A**:
- **Statement A**: "Promotes precocious reproductive development late in the growing season."
- This statement is incorrect because vernalization does not promote flowering late in the growing season; rather, it prepares the plant to flower at the appropriate time after a cold period.

3. **Analyzing Statement B**:
- **Statement B**: "Inhibits vegetative growth."
- This statement is also incorrect. Vernalization does not inhibit vegetative growth; instead, it can actually promote vegetative growth before the plant transitions to flowering.

4. **Analyzing Statement C**:
- **Statement C**: "Prevents precocious reproductive development early in the growing season."
- This statement is misleading. Vernalization does not prevent flowering; it actually ensures that flowering occurs at the right time. Therefore, this statement is incorrect.

5. **Analyzing Statement D**:
- **Statement D**: "Promotes flowering by period of low temperature in biennial plants."
- This statement is correct. Vernalization indeed promotes flowering in biennial plants after they have been exposed to a period of low temperature.

### Conclusion:
The correct choice regarding vernalization is **Statement D**.