1.

In this question, a part of the sentence is given in bold. Below are given alternatives to the bold part at 1, 2 and 3 which may improve the sentence.Choose the correct alternative. In case no improvement is needed your answer is (4).The advancements in medical science has proved to be a boon for all of us.1). has proven2). had proven3). have proved4). No improvement

Answer»

have PROVED is the BEST SUITED



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