In a round table conference six persons are participating, They are Andy, Bob, Charles, Douglas, Elena and Fred. Bob is sitting between Charles and Elena and is opposite to Andy. Douglas is sitting to the left of Elena.If Elena interchanges her place with the person sitting opposite to Bob, then who sits to the right of Fred?
Options:
A .  Andy
B .  Charlie
C .  Bob
D .  None of these.
E .  Cannot be determined.
Answer: Option D
As Bob is sitting between Charles and Elena and Douglas is sitting to the left of Elena. We get following arrangement. Andy is opposite Bob. Therefore, the final arrangement is as follows. Elena sits to the right of Fred if Elena interchange her place with the person sitting opposite to Bob.
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