The record of the enrollment of boys and girls in a school over 6 years has been presented in the following bar graph.

 In which year was the total enrollment the highest?

The bar graph shows the number of boys and girls enrolled in per year.

According to question, We have to find in which year the enrolment is maximum,

We will go Option wise

Option A : In 1999

Students enrolled  = 329 + 189 = 518 

Option B : in 1998 

Student enrolled = 292 + 186 = 478

Option C : in 1997 

Student enrolled = 290 + 250 = 540

Option D : in 2000

Student enrolled = 312 + 205 = 517

Hence, in 1997, the number of student enrolled is highest.

Hence, Option C is correct.