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    Select Question Language :

    Why are danger signals red in colour?

    (a) Red colour has the shortest wavelength.
    (b) Red colour is least scattered.
    (c) Red colour has the longest wavelength.
    (d) Red colour is scattered the most.

    Options :-

    1. Only (a) 
    2. Only (b) 
    3. Only (c)
    4. Only (d)
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