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Let the area bounded by the curve y=f(x)...

Let the area bounded by the curve `y=f(x)`, x-axis and the ordinates `x=1` and `x=a` be `(a-1)sin(3a+4)`.Statement-1: `f(x)=sin(3x+4)+3(x-1)cos(3x+4)`.Statement-2: If `y=int_(g(x))^(h(x)) f(t)dt`, then `dy/dx=f(h(x)) h\'(x)-f(g(x)) g\'(x)`. (A) Both 1 and 2 are true and 2 is the correct explanation of 1 (B) Both 1 and 2 are true and 2 is not correct explanation of 1 (C) 1 is true but 2 is false (D) 1 is false but 2 is true

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