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 :
Each sperm of Riccia is a minute, slender curved structure. It is furnished with a pair of whiplash flagella at its anterior end. The sperms do not leave the antheridium until enough moisture is present to permit them to swim about. Several of the sperms may swim downward in the liquid in the neck.
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