Solution
Expression : $$\sqrt{\frac{1.21\times0.9}{1.1\times0.11}}$$
= $$\sqrt{\frac{1.1\times1.1\times0.9}{1.1\times0.11}}$$
= $$\sqrt{\frac{11\times11\times9}{11\times11}}$$
= $$\sqrt9=3$$
=> Ans - (B)
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