Answer : The correct option is, three, dumbbell.
Explanation :
As we know that there are many sub-levels which are s, p, d, f, g and so on. The sub-level are oriented in three directions along the x, y and z axis.
The 's' sub-level has one orbital that are spherically shaped.
The 'p' sub-level has three orbitals [tex](p_x,p_y,p_z)[/tex] that are dumbbell shaped.
The 'd' sub-level has five orbitals [tex](d_{xy},d_{xz},d_{yz}d_{z^2},d_{x^2-y^2})[/tex] that are double-dumbbell shaped.
The 'f' sub-level has seven orbitals [tex](f_{x(x^2-3y^2)},f_{y(x^2-3z^2)},f_{y(3x^2-3y^2)},f_{xz^2},f_{z^3},f_{yz^2},f_{xyz})[/tex] that are complex flower shaped.
Hence, the 'p' sub-level has three orbitals that are dumbbell shaped.
