Correct option is C
Solution:
Total books of Maths and Computers = 17462 + 14308
Total books of Maths and Computers = 31770
Total books of Circuit Theory and Graph Theory = 9948 + 642
Total books of Circuit Theory and Graph Theory = 10590
Ratio of total books of Maths and Computers to Circuit Theory and Graph Theory = 31770 : 10590
Ratio of total books of Maths and Computers to Circuit Theory and Graph Theory = 3 : 1




