P, Q, R and S are four logical statements such that if P is true, then Q is true; if Q is true, then R is true; and if S is false, then both Q and R is true.. Then it follows that

If at least one of Q and R is true, then S is false

if S is false, then both Q and R is true.

P, Q, R and S are four logical statements such that if P is true, then

1.	P, Q, R and S are four logical statements such that if P is true, then Q is true; if Q is true, then R is true; and if S is false, then both Q and R is true.. Then it follows that
A.	if S is false, then both Q and R is true.
B.	If at least one of Q and R is true, then S is false
C.	If P is true, then S is false.
D.	If Q is true, then S is true
Answer» B. If at least one of Q and R is true, then S is false

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P, Q, R and S are four logical statements such that if P is true, then Q is true; if Q is true, then R is true; and if S is false, then both Q and R is true.. Then it follows that

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