The following four vector fields are given in Cartesian co-ordinate system. The vector field which does not satisfy the property of magnetic flux density is
1
\({y^2}{a_x} + {z^2}{a_y} + {x^2}{a_z}\)
2
\({z^2}{a_x} + {x^2}{a_y} + {y^2}{a_z}\)
3
\({x^2}{a_x} + {y^2}{a_y} + {z^2}{a_z}\)
4
\({y^2}{z^2}{a_x} + {x^2}{z^2}{a_y} + {x^2}{y^2}{a_z}\)