If \(A=\hat i yz+\hat jxz + \hat kxy\), then the integral \(\oint\vec A\cdot \vec{dl}\) (where C is along the perimeter of a rectangular area bounded by x = 0, x = a and y = 0, y = b) is
1
\(\frac12(a^3+b^3)\)
2
\(\pi (ab^2+a^2b)\)
3
\(\pi(a^3+b^3)\)
4
0
5
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