Find out the two signs to be interchanged for making following equation correct.
$$\frac{1}{4} \div \frac{1}{64} - 5 + 45 \times 120 = 5$$
If we interchange $$\times\ \ and\ \ -\ $$ sign,
$$\frac{1\ }{4}\div\frac{\ 1}{64}\times 5+45- 120$$
$$=\frac{1\ }{4}\times\ \frac{\ 64}{1}\times 5+45- 120$$
$$=16\times\ 5+45-120$$
$$=80+45-120$$
$$=125-120$$
$$=5.$$
So, Option B is correct.
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