Q: 140 (IAS/1998)

A, B, C, D, E and F, not necessarily in that order are sitting on six chairs regularly placed around a round table. It is observed that A is between D and F, C is opposite D, and D and E are not on neighbouring chairs.
Which one of the following pairs must be sitting on neighbouring chairs ?
question_subject: 
Logic/Reasoning
question_year: 
1998
question_exam: 
IAS
question_sub_subject: 
Reasoning
question_topic: 
Analytical
stats: 
0,224,104,32,224,72,0