Which of the following represent the Green's theorem
1
\(\oint \vec A \cdot d\vec l\) = \(\iint \left( {\vec \nabla \times \vec A} \right).d\vec s\)
2
\(\oint A.ds=\iiint{\left( \nabla .A \right)dv}\)
3
\(\oint \left( {{\rm{Mdx}} + {\rm{Ndy}}} \right) = \int\!\!\!\int \left( {\frac{{\partial {\rm{N}}}}{{\partial {\rm{x}}}} - \frac{{\partial {\rm{M}}}}{{\partial {\rm{y}}}}} \right){\rm{dxdy}}\)
4
\(\oint \overrightarrow{F.}\hat{n}ds=\iiint{\left( \nabla .F \right)dv}\)