The two vectors $\vec{A}$ and $\vec{B}$ are drawn from a common point and $\vec{C} = \vec{A} + \vec{B}$, then angle between $\vec{A}$ and $\vec{B}$ is:
(1) $90^\circ$ if $C^2 = A^2 + B^2$
(2) greater than $90^\circ$ if $C^2 < A^2 + B^2$
(3) greater than $90^\circ$ if $C^2 > A^2 + B^2$
(4) less than $90^\circ$ if $C^2 > A^2 + B^2$
Correct options are: