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  1. Consider the following statements a half adder.

    1. As a half subtractor also
    2. has two outputs CH = x x y and Sn = x ⊕ y for two inputs x and y
    3. has two outputs CH = x + y and SH = x ⊕ y for two inputs x and y
    4. is a combinational circuit
    Which of the statements given above is/are correct?

    2. A.
    1, 3, 4
    B.
    1, 2, 4
    C.
    4 only
    D.
    2 and 3

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    Answer : Option B

    Explanation :

    Let two bit, verify S and B will same.

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