P → Q R 2. P → Q s R 3. P → ε 4. P → Q t R r
Posted: Thu Jul 14, 2022 9:07 am
a) 1 only
b) 1 and 3 only
c) 2 and 3 only
d) 3 and 4 only
b) 1 and 3 only
c) 2 and 3 only
d) 3 and 4 only
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