Directions:
In a school the periodical examination are held every second month. In a session during April 2001 - March 2002, a student of Class IX appeared for each of the periodical exams. The aggregate marks obtained by him in each perodical exam are represented in the line-graph given below.
Marks Obtained by student in Six Periodical Held in Every Two Months During the Year in the Session 2001 - 2002.
Maximum Total Marks in each Periodical Exam = 500

Question:
In which periodical exams did the student obtain the highest percentage increase in marks over the previous periodical exams?

Option A):
Oct, 01
Option B):
Dec, 01
Option C):
June, 01
Option D):
August, 01

Correct Answer is Option A):
Oct, 01

Explanation:
Percentage increase in marks in various periodical exams compared to the previous exams are:

Clearly, highest percentage increase in marks is in Oct 01.