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    Question

    Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The letter of that part is the answer. If there is ‘No error’, the answer is (5). (Ignore errors of punctuation, if any).

    With the growing demand for electric vehicles, (1) /

    automakers are investing heavily (2) / on research and development (3)/ to improve battery technology.(4) 
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer
    E No error Correct Answer Incorrect Answer

    Solution

    Use "in" instead of "on" in the phrase "investing in research and development."

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