The correct option is D None of these
The data given in the graph can be tabulated as given below:
College1988−891989−901990−91Private Engg.College120180250Govt. Engg.College80120130Regional Engg.College4075100IIT304080
Total number of students in 1990-91 = (250 + 130 + 100 + 80) 100 = 56000.
Hence the total number of students in 1991-92 = 0.9 × 56000 = 50400.