Value of 2 tan^-1(1/2) + tan^-1 of a given number, as a single tan^-1

1. A.
   $\tan^{-1}\frac{17}{31}$
2. B.
   $\tan^{-1}\frac{19}{31}$
3. C.
   $\tan^{-1}\frac{31}{17}$
4. D.
   $\tan^{-1}\frac{31}{19}$

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1. A.
   $\tan^{- 1}\left( \frac{42}{24} \right)$
2. B.
   $2\tan^{- 1}\left( \frac{42}{24} \right)$
3. C.
   $\tan^{- 1}\left( \frac{24}{41} \right)$
4. D.
   $\tan^{- 1}\left( \frac{41}{12} \right)$

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