P | Q | R | S | |
(a) | True | False | True | False |
(b) | False | True | False | False |
(c) | True | True | False | False |
(d) | False | False | True | True |
Answer:
\[P\to False\] \[Q\to False\] \[R\to True\] \[A\to True\]
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