a) 4 a 5 6 b 7 8 a c
b) 4 a 5 c 6 b 7 a 8
c) 4 b 5 a 6 c 7 a 8
d) 4 a 5 b 6 c 7 a 8
Answer: c
Explanation: Given postfix expression: 4 5 6 a b 7 8 a c
infix ⇒ 4 (5 a 6) b (7 a 8) c
⇒ (4 b (5 a 6)) (7 a 8) c
⇒ (4 b (5 a 6)) c (7 a 8)
So, the required infix expression is 4 b 5 a 6 c 7 a 8.
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