Is CO paramagnetic or Diamagnetic molecule ? And how to check it ?

O2 is paramagnetic because it has two unpaired electrons, one in each of its p* orbitals. d. NO has an odd number of electrons and, therefore, must be paramagnetic. e. CO is diamagnetic because all of its electrons are paired.
SparkNotes: Molecular Orbitals: Problems and Solutions
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Paramagnetic means it turns parallel to a magnetic field. Diamagnetic means it turns across a magnetic field.