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Reagent(s) which can be used to bring about the following transformation is(are) O COOH H O C O O O COOH OH C O O

LiAIH 4 in (C 2 H 5 ) 2 O
BH 3 in THF
NaBH 4 in C 2 H 5 OH
Raney Ni/H 2 in THF

Correct answer: NaBH 4 in C 2 H 5 OH

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