How many of the following metal ions have similar value of spin only magnetic moment in gaseous state _________ ? (Given: Atomic number: V, \(23\); Cr, \(24\); Fe, \(26\); Ni, \(28\))
\( \mathrm{V^{3+}}, \mathrm{Cr^{3+}}, \mathrm{Fe^{2+}}, \mathrm{Ni^{3+}} \)
