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Explanation:

(b) B only is the correct answer choice.
Statement A is invalid, as ‘No WB are PC’ cannot be validly concluded. What can, however, be validly concluded is that ‘Some PC (which are all D in shaded  position) are not WB’.

D = Dinosaurs
PC = Prehistoric creatures
WB = Water buffaloes
Statement B is valid as evident from the Venn diagram

F = Frank creatures
P = Politicians
C = Crocodiles
P is a subset of F.
F and C are disjoint sets.
As the main set F can never intersect with C, the subset D will also never intersect or coincide with C.
Statement C is invalid: No valid conclusion can follow from two negative premises, as negatives have the
effect of separating one term from the others.

Statement D is invalid, as the ‘Some GI Joes’ who like bananas need not be monkeys.

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