Evaluate:

​$$\sqrt{ \left(92 + \sqrt{\left(60 + \sqrt {\left( 11 + \sqrt{\left(16 + \sqrt{(81)}\right)} \right)} \right)}\right)}$$​​

Correct option is A

Given: ​

​$$\sqrt{ \left(92 + \sqrt{\left(60 + \sqrt {\left( 11 + \sqrt{\left(16 + \sqrt{(81)}\right)} \right)} \right)}\right)}$$ 

Solution: ​

​$$\sqrt{ \left(92 + \sqrt{\left(60 + \sqrt {\left( 11 + \sqrt{\left(16 + \sqrt{(81)}\right)} \right)} \right)}\right)}\\ \ \\ =\sqrt{ \left(92 + \sqrt{\left(60 + \sqrt {\left( 11 + \sqrt{\left(25\right)} \right)} \right)}\right)}\\ \ \\ =\sqrt{ \left(92 + \sqrt{\left(60 + \sqrt {\left( 16 \right)} \right)}\right)}\\ \ \\ =\sqrt{ \left(92 + \sqrt{\left(64 \right)}\right)}\\ \ \\ =\sqrt{ \left(100\right)}\\ \ \\ = 10$$​​