# Let , be an even function for all x∈R, then sum of all possible values of 'a' is (where [ ] and { } denote greatest integer function and fractional part functions respectively) (A) $\frac{17}{6}$                 (B) $\frac{53}{6}$                (C) $\frac{31}{3}$                  (D) $\frac{35}{3}$

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