A common chamber in sponges is

Options :
  1. incurrent canal
  2. radial canal
  3. spongocoel
  4. all the above
Answer and Explanation :-

Answer: Option 3

Explanation:

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We are rational creatures, Professor Jove explained hope is irrational. We thus set ourselves up for one dispiriting fall after the next. Anger and depression are not diseases or dysfunctions or anomalies they are perfectly rational responses to the myriad avoidable disappointments that begin in a thoroughly irrational hope.
-Shalom Auslander Hope: A Tragedy