We have been given the truth table for three variables p, q, and r. as shown below
p q r
A T T T
B T T F
C T F T
D T F F
E F T T
F F T F
G F F T
H F F F
Now we need to find Which statements are true for rows A and E for the following statements:
p ↔ q p ↔ r q ↔ p q ↔ r r ↔ p r ↔ q
To find that we need to use table of P <-> Q as shown in picture.
We know that if both statements are true for P and Q then only P <-> Q will be true. So using that trick we see that only q<->r and r<->q are the final answer as shown in the attached picture.
