Consider the non-empty set consisting of children in a family and a relation R defined as aRb if a is brother of b.Then R is

Question

$\begin{array}{1 1}(a)\;symmetric\;but\;not\;transitive & (b)\;transitive\;but\;not\;symmetric\\(c)\;neither\;symmetric\;nor\;transitive & (d)\;both\;symmetric\;and\; transitive\end{array}$