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  1. What invention was first installed at a Hartford, Connecticut bank in 1889?

    2. A.
    Automatic teller machine
    B.
    Time-lock safe
    C.
    Burglar alarm
    D.
    Pay telephone

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    Answer : Option D

    Explanation :

    William Gray, inventor of the pay telephone, also invented the inflatable chest protector worn by baseball umpires and catchers.

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