If \( 10^{n}+3.4^{n+2}+k \) is divisible by 9 for all \( n \in N \), then the least positive int....

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If \( 10^{n}+3.4^{n+2}+k \) is divisible by 9 for all \( n \in N \),
\( \mathrm{P} \)
then the least positive integral value of \( k \) is
(1) 5
(2) 3
(3) 7
(4) 1


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