There are $10$ turns in coil $M$ and $15$ turns in coil $N$. If a current of $2\ A$ is passed through coil $M$,then the flux linked with coil $N$ is $1.8 \times 10^{-3}\ Wb$. If a current of $3\ A$ is passed through coil $N$,then the flux linked with coil $M$ is:

• A
  $1.2 \times 10^{-3} \ Wb$
• B
  $2.7 \times 10^{-3} \ Wb$
• C
  $1.8 \times 10^{-3} \ Wb$
• D
  $4.05 \times 10^{-3} \ Wb$