Mathematics- m am 2017 q.17 for a> 0,b > 0, let = be a planar vector field. let c= (a.y) e rË |x* +y* =a +b) be the circle oriented anti-clockwise. then (a) (b)

MATHEMATICS- M AM 2017 Q.17 For a> 0,b > 0, let = be a planar vector field. Let C= (a.y) e RË |x* +y* =a +b) be the circle oriented anti-clockwise. Then (A) (B) 2 (C) 2mab (D) 0 ab