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If $n (A) = 3$ and $n (B) = 5$ then number of one-one functions that can be defined from $A$ to $B$ is

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Correct option is D

Number of one-one functions =5x4x3=60.

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If n(A)=3 and n(B)=5 then number of one-one functions that can be defined from A to B is

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If $n (A) = 3$ and $n (B) = 5$ then number of one-one functions that can be defined from $A$ to $B$ is