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Answer

Correct Option is None of these

Solution:
Let he attempted x correct questions.
& (75 – x) wrong questions. But (75 – x – 4) carries negative marking. Therefore
His score 3x – (71 – x) – 25 × (0.5) = 108.5
= 3x – 71 + x = 121
4x = 192
x = 48
hence option (e)

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