CAT Exam Model Paper 6 with solutions for free online practice

From the first statement: E, G, D < B < F
From the second statement: A, D < C < E
From the third statement: G < F, E
Combining the three statements we get:
A, D < C < E < B < F
G < E < B < F
C, G is the only possible pair of twins from the given options.