Wb JeeDifferentiationWB JEE 2011MCQ+1 / -0.252011If \(y = {\tan ^{ - 1}}{{\sqrt {1 + {x^2}} - 1} \over x}\), then y'(1) =A1/4B1/2C\(-\)1/4D\(-\)1/2Check AnswerClear SelectionReveal AnswerShow Explanation