Statement-1: $\underset{\pi /6}{\overset{\pi /3}{\int }}\frac{dx}{1+\sqrt{\tan x}}=\frac{\pi }{6}$

Statement-2: $\underset{a}{\overset{b}{\int }}f\left(x\right) dx=\underset{a}{\overset{b}{\int }}f(a+b-x) dx$

Which of above statements are true

Statement-1 is false, Statement-2 is true

Statement-1 is true, Statement-2 is false

Statement-1 is true, Statement-2 is true, Statemetn-2 is correct explanation for Statement-1

Statement-1 is true, Statement-2 is true, Statemetn-2 is not correct explanation for Statement-1