Let $\overrightarrow{\mathrm{A}}=\widehat{\mathrm{i}}\mathrm{Acos\theta }+\widehat{\mathrm{j}}\mathrm{Asin\theta }$ be any vector. Another vector $\overrightarrow{\mathrm{B}}$ which is normal to $\overrightarrow{\mathrm{A}}$ is

• A

  $\widehat{\mathrm{i}}\mathrm{Bcos\theta }+\widehat{\mathrm{j}}\mathrm{Bsin\theta }$

• B

  $\widehat{\mathrm{i}}\mathrm{Bsin\theta }+\widehat{\mathrm{j}}\mathrm{Bcos\theta }$

• C

  $\widehat{\mathrm{i}}\mathrm{Bsin\theta }-\widehat{\mathrm{j}}\mathrm{Bcos\theta }$

• D

  $\widehat{\mathrm{i}}\mathrm{Bcos\theta }-\mathrm{\hspace{0.17em}}\widehat{\mathrm{j}}\mathrm{Bsin\theta }$