The operation which is commutative but not associative is:

The answer is D.

Remark:

commutative law: A operator B = B operator A

associative law: A operator (B operator C) = (A operator B) operator C

@chauhansunil20th

The implication is a logic Gate??

@akash.dinkar12 why not? why even this doubt?

NAND gate is commutative but not associative.

GATE Overflow