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option A will be correct

 integration of  sin^m * cos^n dx

if(m & n both are even integers)

then [(m- 1)(m -3)(m-5)....1(n -1)(n -3)(n -5)...1/(n+m)(n+ m -2)(n +m -4)...1]*pie/2

else  [(m- 1)(m -3)(m-5)....1(n -1)(n -3)(n -5)...1/(n+m)(n+ m -2)(n +m -4)...1]* 1
Answer:

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