Assertion : Soyabean and sugarbeet flower when they are exposed to a photoperiod shorter than critical period.
Reason : Most of winter flowering plants are LDP.

Options

A. If Both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion and reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but reason is false, then mark (3)
D. If both Assertion and reason are false statements, then mark (4).

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states: "Soybean and sugar beet flower when they are exposed to a photoperiod shorter than critical period."

- **Soybean** is a short-day plant, meaning it flowers when the photoperiod is shorter than a certain critical duration (typically around 8-10 hours).
- **Sugar beet**, on the other hand, is a long-day plant, which means it requires a longer photoperiod (typically around 14-16 hours) to flower.

Since the assertion claims that both plants flower under shorter photoperiods, it is incorrect because sugar beet does not flower under such conditions.

### Step 2: Understand the Reason
The reason states: "Most of winter flowering plants are long day plants."

- Winter flowering plants are typically short-day plants because they flower when the nights are longer and days are shorter.
- Therefore, this statement is also incorrect because it contradicts the known classification of winter flowering plants.

### Step 3: Conclusion
Both the assertion and the reason are false. Therefore, the correct answer is that both the assertion and reason are false statements.

### Final Answer
The correct option is 4: Both assertion and reason are false.

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