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    Question

    One of the most ______ source of indoor air pollution is

    the allergens. House dust mites (HDM) are very small insects not _______ to the naked eye and are the commonest source of allergy in the house. They are ubiquitous and _____ in a warm and moist atmosphere. They _____ very fast and are very difficult to eradicate. Modem houses present ample breeding spaces for them in the form of carpets, curtains, mattresses, pillows, etc. Select the most appropriate option to fill in the blanks.
    A important; visible; thrive; breed Correct Answer Incorrect Answer
    B serious; clear; flourish; cultivate Correct Answer Incorrect Answer
    C influential; noticeable; bloom; nurture Correct Answer Incorrect Answer
    D primary; perceptible; grow; propagate Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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