Assertion : Leucosolenia shows ascon type of canal system Reason : In Leucosolenia water passes through ostia `rarr` spongocoel `rarr` osculumA. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false

Assertion : Leucosolenia shows ascon type of canal system Reason : In

1.	Assertion : Leucosolenia shows ascon type of canal system Reason : In Leucosolenia water passes through ostia `rarr` spongocoel `rarr` osculumA. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false
Answer» Correct Answer - A Leucosolenia shows simplest (ascon) type of canal system. In this, surrounding water enter the canal system through ostia. This water of sea enters into the spongocoel and pushed out readily thorugh osculum. Course taken by the water current in the body of spongs may be shown as under. Ingressing `underset("Ostia")overset("Through")(rarr)` Spongocoel `underset("Osculum")overset("Through")(rarr)` To outside