MCQ

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$\int \frac{x+1}{\sqrt{1+x^2}} d x=\ ...... $

• A
  $\sqrt{1+x^2}+\tan ^{-1} x+c$
• B
  $\sqrt{1+x^2}-\log \left\{x+\sqrt{1+x^2}\right\}+c$
• ✓
  $\sqrt{1+x^2}+\log \left\{x+\sqrt{1+x^2}\right\}+c$
• D
  $\sqrt{1+x^2}+\log (\sec x \tan x)+c$