He has puzzled . . . . . . . . the figures for hours without being able to make head or tail of them.
A. on
B. over
C. with
D. from
Answer: Option B
Solution (By Examveda Team)
'Puzzle over' means 'to think or worry for a long time about (something)'. Hence it makes the sentence meaningful.This Question Belongs to Competitive English >> Preposition
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