The mean and standard deviation (SD) of marks obtained by 50 students of a class in 4 subjects are given below: $\begin{array}{|c|c|c|c|c|} \hline \text { Subject } & \text { Mathematics } & \text { Physics } & \text { Chemistry } & \text { Biology } \\ \hline \begin{array}{c} \text { Mean } \\ \text { Marks } \end{array} & 40 & 28 & 38 & 36 \\ \hline \text { SD } & 15 & 12 & 14 & 16 \\ \hline \end{array}$ What is the coefficient of variation marks in Mathematics?

• Correct answer
  A

  $37.5 \%$
• B

  $38.0 \%$
• C

  $38.5 \%$
• D

  $39.0 \%$

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