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The rank of the matrix given below is:

$$\begin{bmatrix} 1 &4 &8 &7\\ 0 &0& 3 &0\\ 4 &2& 3 &1\\ 3 &12 &24 &2 \end{bmatrix}$$

1. $3$
2. $1$
3. $2$
4. $4$
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It's an non-singular 4x4 matrix, hence its rank is 4. A non-singular matrix has non-zero determinant.

(D) is correct option!

edited
+3

see this..