A logical function of four variable is given as f (A, B,

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A logical function of four variable is given as
f (A, B, C, D) = (A + BC) (B + CD)
The function as a sum of product is—

1. A + BC + ACD + BCD
2. A + BC + ACD + BCD
3. AB + BC + ACD + BCD
4. AB + AB + ACD + BCD

Correct Option: C

f = (A + BC) B + (A + BC) CD
= AB + BC + ACD + BCD