Comprehension Passage
The following line graph gives the percentage of the number of candidates who qualified in examination out of the total number of candidates who appeared for the examination over a period of seven years from 2008-2014:
The difference between the percentage of candidates qualified, was maximum in which of the following pair of years?
1
2008 and 2009
2
2011 and 2012
3
2012 and 2013
4
2013 and 2014