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Which of the following is equivalent expression to $A \oplus B \oplus C$ :

1. $(A+B+C)(\bar A+\bar B+\bar C )$
2. $( A+B+C) (\bar A +\bar B +C)$
3. $ABC + \bar A(B \oplus C ) + \bar B (A \oplus C )$
4. None

A⊕B⊕C is standand output of SUM of FULL ADDER which is nothing but $\sum$ m ( 1,2,4,7).
Expand Option C you will get get $\sum$ m ( 1,2,4,7).

got it

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