The line chart given below shows the average marks obtained by each student of 6 classes C1, C2, C3, C4, C5 and C6 in a school.

Average marks of each students of which class is 100% of the average marks of each student of class C2?

Correct option is B

Given:
A line chart displaying the average marks of students in 6 classes.
Solution:
According to the question, we need to find the class whose average marks are 100% of class C2 = 89 
This implies we are looking for a class that has the exact same average marks as class C2.
By observing the data points on the line chart, the average marks for class C4(89) perfectly match the average marks for class C2.
Final Answer
So the correct answer is (b)