A dumbbell$-$shaped object is composed by two equal masses, $m,$ connected by a rod of negligible mass and length r $.$ If I$1$ is the moment of inertia of this object with respect to an axis passing through the center of the rod and perpendicular to it and $12$ is the moment of inertia with respect to an axis passing through one of the masses, it follows that

A$.11=12.$

B$.11>12.$

C$.12>11.$