Which condition is necessary for a reflexive relation?

A. हर a के लिए (a,a) relation में हो / For every a, (a,a) is in the relation

Step 1: Identify the concept: this is reflexive relation. Step 2: In a reflexive relation every element of the set must be related to itself. Step 3: Remember reflexive with self-pair.

Step 1: concept पहचानें: यह reflexive relation है। Step 2: Reflexive relation में set का हर element अपने आप से related होना चाहिए। Step 3: Reflexive को self-pair से याद रखें।