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: B
Solution :
Porocytes mean pore cells. Within the sponge body wall there are special, large and tubular cells, called pore cells or porocytes. Each porocyte contains a central space communicating with the outside as well as the spongocoel. These spaces are called ostia or dermal pores or incurrent pores. These permit water to flow from outside into the spongocoel.
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