Let \( f: N \rightarrow N \) be a function such that \( \mathrm{f}(...

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Let \( f: N \rightarrow N \) be a function such that \( \mathrm{f}(\mathrm{m}+\mathrm{n})=\mathrm{f}(\mathrm{m})+\mathrm{f}(\mathrm{n}) \) for every \( m, n \in N \). If \( \mathrm{f}(6)=18 \),
P then \( f(2) \cdot f(3) \) is equal to:
[JEE Main-2021 (August)]
(a) 6
(b) 54
(c) 18
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