Two identical current-carrying coaxial loops, carry current I in an opposite sense. A simple amperian loop passes through both of them once. Calling the loop as C, a)\(\oint\limits_{c}{B.dl=\pm 2\mu {}_{0}}I\)b) the value of\(\oint\limits_{c}{B.dl\)c) there may be a point on C where B and dl are perpendicular d) B vanishes everywhere on C