Assertion (A): Animals belonging to the phylum Porifera lack true tissues and organs.
Reason (R): Poriferans exhibit a cellular level of organization, where specialized cells perform specific functions.
1
Both A and R are true, and R is the correct explanation of A.
2
Both A and R are true, and R is not the correct explanation of A.
3
A is true, but R is false
4
A is false, R is true.