If xsin60°.tan30° = sec60°.cot45° , then the value of x is?

Answer: Option C

$$\begin{array}{rl}& x\sin 60^{\circ }.\tan 30^{\circ }=\sec 60^{\circ }.\cot 45^{\circ }\\ & \text{Put values }\\ & \Rightarrow x.\frac{\sqrt{3}}{2}.\frac{1}{\sqrt{3}}=2.1\\ & \Rightarrow \frac{x}{2}=2\\ & \Rightarrow x=4\end{array}$$