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 periodical exam are represented in the line-graph given below.In which periodical exams there is a fall in percentage of marks as compared to the previous periodical exams ?

In a school the periodical examination are held every second month. In

1.	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 periodical exam are represented in the line-graph given below.In which periodical exams there is a fall in percentage of marks as compared to the previous periodical exams ?
A.	None
B.	June, 01
C.	Oct, 01
D.	Feb, 02
Answer» B. June, 01