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If $\text{I}=\begin{bmatrix}1&0\\0&1\end{bmatrix},\text{J}=\begin{bmatrix}0&1\\-1&0\end{bmatrix}$ and $\text{B}=\begin{bmatrix}\cos\theta&\sin\theta\\-\sin\theta&\cos\theta\end{bmatrix},$ then B equals:

• ✓
  $\text{I}\cos\theta+\text{J}\sin\theta$
• B
  $\text{I}\sin\theta+\text{J}\cos\theta$
• C
  $\text{I}\cos\theta-\text{J}\sin\theta$
• D
  $-\text{I}\cos\theta+\text{J}\sin\theta$