# In which of the following pairs, the central atoms have the same number of lone pairs of electrons ?

$\begin {array} {1 1} (1)\;PCI_5,BrF_5 & \quad (2)\;XeF_2,ICI \\ (3)\;XeF_4,CIO_4 & \quad (4)\;SCI_4,CH_4 \end {array}$