A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: A
Solution :
The gametophytic plant of Pinus is heterosporous. It bears both microspores (pollen grains) and megaspores (embryo sac) which develop in microsporangium and megasporangium respectively. Both megaspore and microspore mother cells act as the last stage of sporophytic generation.
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