If you have an integral with the substitution x = 2 sin θ and after integration get the answer 1/2θ - 4 cos θ + C, what is the answer in terms of ?
(a) arcsin (x/2) -4√4 - x² + C
(b) sin (x/2) -4√4 - x² + C
(c) 1/2 arcsin (x/2) -2√4 - x² + C
(d) 1/2 arcsin (x/2) -√4 - x² + C
(e) none of these