The sum of the first 35 terms of the series $$\frac{1}{2}$$ $$ + $$ $$\frac{1}{3}$$ $$ - $$ $$\frac{1}{4}$$ $$ - $$ $$\frac{1}{2}$$ $$ - $$ $$\frac{1}{3}$$ $$ + $$ $$\frac{1}{4}$$ $$ + $$ $$\frac{1}{2}$$ $$ + $$ $$\frac{1}{3}$$ $$ - $$ $$\frac{1}{4}$$ . . . . . is = ?

A. $$ - \frac{1}{2}$$

B. $$ - \frac{1}{2}$$

C. $$\frac{1}{4}$$

D. None of these

Answer: Option B

Solution(By Examveda Team)

Clearly , sum of first 6 terms is zero , So sum of first 30 terms = 0
∴ Required sum
$$\eqalign{ & {\text{ = }}\left( {\frac{1}{2} + \frac{1}{3} - \frac{1}{4} - \frac{1}{2} - \frac{1}{3}} \right) \cr & = - \frac{1}{4} \cr} $$