The projection of the vector \( 3 \hat{i}+4 \hat{\mathrm{k}} \) on ...

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The projection of the vector \( 3 \hat{i}+4 \hat{\mathrm{k}} \) on \( y \) axis is:
(A) zero
(B) 5
(C) 4
(D) 3
\( \mathrm{P} \)
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