The question is here: http://dl.getdropbox.com/u/175564/logic.png The correct answer is D. My attempt to the problem: Let the beginnings of the sentences be A. In a, A is B -/-> C is D. In b, A is B -/-> C is D. These first two do not make sense. in c and d, the word "only" suggests exaggeration. In c, A is B -/-> B must be C. In d, A is B -/-> A must be C. Still, I am sure thoroughly why d is the correct answer. Please, let me know why.