The bar graph shows the number of students enrolled for a science course in institutes A and B during 5 years from 2014 to 2018

What is the ratio of the total numbers of students enrolled in institute B in 2015 and 2017 to that of students enrolled in institute A in 2014 and 2016?

A

111 : 91

B

91 : 111

C

92 : 137

D

137 : 92