Let F1(A,B,C) = ( A B ) [ C ( A B ) ] A a n d F 2 ( A , B ) = ( A B ) ( B A )  be two logical expressions. Then:

Option 1 -

Both F1 and F2 are not tautologies

Option 2 -

F1 is not a tautology but F2 is a tautology

Option 3 -

F1 and F2 both are tautologies

Option 4 -

F1 a tautology but F2 is not a tautology

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