$G = U(98) = \{k \in \mathbb{N} : k \leq 98,\ \gcd(k,98)=1 \}$ be a group, wher…

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$G = U(98) = \{k \in \mathbb{N} : k \leq 98,\ \gcd(k,98)=1 \}$ be a group, where $\mathbb{N}$ is the set of all natural numbers.

The number of generators of the largest cyclic subgroup of $G$ is

(a) 12
(b) 32
(c) 42
(d) 49

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