A small planar loop with magnetic dipole moment \(\vec{\mu}\) is placed in a uniform external magnetic field \(\vec{B}\). Four orientations of the dipole moment relative to the magnetic field are considered:

Orientation 1: \(\vec{\mu}\) is parallel to \(\vec{B}\) (\(\theta = 0^\circ\))
Orientation 2: \(\vec{\mu}\) is at an angle \(\theta = 120^\circ\) relative to \(\vec{B}\)
Orientation 3: \(\vec{\mu}\) is perpendicular to \(\vec{B}\) (\(\theta = 90^\circ\))
Orientation 4: \(\vec{\mu}\) is antiparallel to \(\vec{B}\) (\(\theta = 180^\circ\))

Which of the following correctly ranks the orientations based on the magnetic potential energy \(U\) of the dipole-field system, from least to greatest?