The full marks for a paper is 300. The breakup of the marks into theory X practical Y and project Z . Which are the three components of evaluation is `6:5:4` In order to pass one has to score at least 40% ,50% and 50% respectively in X Y Z and 60% in aggregate. The marks scored by four students A B C and D are shown in the given bar graph

How much percentage marks more than B has C scored in practical

Options

A. 40
B. 30
C. 60
D. 20