Solution
Expression : 25 + 18 ÷ 2 - 4 = 20
(A) : + and ÷
$$\equiv25\div18+2-4=20$$
L.H.S. = $$1.39-2=-0.61\neq20$$
(B) : + and -
$$\equiv25-18\div2+4=20$$
L.H.S. = $$25-9+4=20$$
=> Ans - (B)
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