A thin wire carrying current i is bent to form a closed loop of one turn. The loop is placed in y-z plane with centre at origin. If R is the radius of the loop, then
A. At a point (x, 0) on x-axis `B_(x) = (mu_(0)iR^(2))/(2(R^(2) + x^(2))^(3//2))`
B. `int_(0)^(oo) B_(x) dx = (mu_(0)i)/(2)`
C. `int_(0)^(-oo) B_(x) dx = mu_(0)i`
D. `int_(-oo)^(oo) B_(x) dx = 0`
