In a symmetric relation if (a,b) is in the relation then what is necessary?

A. (b,a) भी relation में हो / (b,a) is also in the relation

Step 1: Identify the concept: this is symmetric relation. Step 2: In a symmetric relation the reverse ordered pair must also be present. Step 3: Remember symmetric as mirror pair.

Step 1: concept पहचानें: यह symmetric relation है। Step 2: Symmetric relation में ordered pair reverse करने पर भी relation में होना चाहिए। Step 3: Symmetric को mirror pair से याद रखें।