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On which bench there are three students ?

  • A.Bench I
  • B.Bench II
  • C.Bench III
  • D.Bench I or II

Answer: A

Correct answer: Bench I

F sits with only B, so that bench holds exactly those two. A is on bench I and G on bench III. C will not sit with A, E or D, so she must join G on bench III, which leaves D and E to sit with A. The benches are therefore I: A, D, E - II: F, B - III: C, G. Each bench needs a girl: C covers III, so B must be the girl on II, and one of A and D the girl on I - D, since the group of girls named is B, C and D.

Bench II holds F and B alone and bench III holds C and G, so the remaining three - A, D and E - must all be on bench I.

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