Let the smallest positive value of x for...

Let the smallest positive value of x for which the function ` f(x)=sin""(x)/(3)+sin""(x)/(11), ( x in R )` achieves its maximum value be ` x_(0)`. Express `x_(0)` in degree i.e. ` x_(0)=alpha^(0)`. Then , the sum of the digits in ` alpha ` is

A

15

B

17

C

16

D

18

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The correct Answer is:

D

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