Which two signs and two numbers should be interchanged to make the given equation correct?
$$16 + 8 \times 25 - 15 \div 5 = 138$$
By Trial and Error method,
Option A
$$16\times8+15-25\div5=138$$
$$16\times8+15-5=138$$
$$128+15-5=138$$
$$138=138$$
Hence, the correct answer is Option A
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