A. The pollen grain is generally spherical measuring about 25 - 50 cm in diameter.
B. In over 60% of angiosperms , pollen grains are shed at 2 celled stage.
Select the statement that holds true for the above statement .

Options

A. Both 'A' and 'B' are correct
B. Only 'B' is correct
C. Only 'A' is correct
D. Both 'A' and 'B' are incorrect

Answer

To solve the question, we need to analyze the two statements provided about pollen grains and determine which one is true.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- Statement A claims that "The pollen grain is generally spherical measuring about 25 - 50 cm in diameter."
- The key point here is the measurement. Pollen grains are typically measured in micrometers (µm), not centimeters (cm). The correct diameter of pollen grains is usually around 25 to 50 micrometers (µm), which is much smaller than the stated 25 - 50 cm.
- Therefore, Statement A is **incorrect**.

2. **Analyze Statement B**:
- Statement B states that "In over 60% of angiosperms, pollen grains are shed at the 2-celled stage."
- This statement is accurate. In the majority of angiosperms (flowering plants), pollen grains are indeed shed when they are at the 2-celled stage, which consists of a vegetative cell and a generative cell.
- Therefore, Statement B is **correct**.

3. **Conclusion**:
- Since Statement A is incorrect and Statement B is correct, we conclude that the true statement is Statement B.

### Final Answer:
- The correct statement is **B**: In over 60% of angiosperms, pollen grains are shed at the 2-celled stage.

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