The correct option is C equal
The data given in the graph can be tabulated as given below:
College1988−891989−901990−91Private Engg.College120180250Govt. Engg.College80120130Regional Engg.College4075100IIT304080
Growth rate in number of students in Govt. Engg. College = 120−8080=50%
Growth rate in number of students in Private Engg. College = 180−120120=50%
Hence the growth rate is equal.