When vector A =2 i +3 j +2 k is subtracted from vector B, it gives a vector equal to 2 j. Then the magnitude of vector B will be:

When vector $\displaystyle \overrightarrow{\mathrm{A}}=2 \hat{i}+3 \hat{j}+2 \hat{k}$ is subtracted from vector $\displaystyle \overrightarrow{\mathrm{B}}$, it gives a vector equal to $\displaystyle 2 \hat{j}$. Then the magnitude of vector $\displaystyle \overrightarrow{\mathrm{B}}$ will be :