If $10 \mathrm{gcms}^{-1}=x \mathrm{Ns}$, then the number $x$ is

• A

  $1 \times 10^{-5}$
• Correct answer
  B

  $1 \times 10^{-4}$
• C

  $1 \times 10^{-6}$
• D

  $1 \times 10^{-3}$

Hence, the correct answer is option: 'B'.