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    Question

    In the following questions, sentences are given with a

    part in bold. The given phrase in bold may or may not contain an error. If a phrase has an error, one of the options following can replace the incorrect phrase. The correct phrase which replaces the erroneous phrase will be your answer. If the sentence is correct then select ‘No  improvement required’ as your answer. Physical activity has been projected to be helpful on avoidance of depression, by the expert 
    A projected to be helpful about avoidance Correct Answer Incorrect Answer
    B projected to be helpful in the avoidance Correct Answer Incorrect Answer
    C projected to be helpful for avoidance Correct Answer Incorrect Answer
    D projected to be helpful of avoidance Correct Answer Incorrect Answer
    E no substitution required Correct Answer Incorrect Answer

    Solution

    The correct preposition after "helpful" is "in" when referring to processes or actions (e.g., "helpful in solving problems") Also, "avoidance" is a noun, so it needs a preposition that fits with "helpful" + noun structure.

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