Identify correct pair of properties of [Co(NH3)6]3+ complex ion.
The coordination complex [Co(NH3)6]3+ has a d6 electron configuration. It undergoes a low spin arrangement, where the electrons fill the lower energy orbitals before pairing up.
Due to the presence of unpaired electrons, it exhibits paramagnetic behavior.
Therefore, the correct option is (C) Low spin, paramagnetic.