1. The postfix expression: a b d e * + a d * f - / - b -. Then the infix expression is
(A) b - (d + b * e) / (a * d –f) - a
(B) a - (b + d * e) / (a * d –f) - b
(C) b - (a + d * f) / (b * d –e) - a
(D) a - (f + d * a) / (e * d –b) – b.

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