The pair having similar geometry is: PCl3, NH4+; BeCl2, H2O; CH4, CCl4; IF5, PF5

CH4 has 8 electrons around the central carbon atom. This means there are four electron pairs arranged in a tetrahedral shape. There are no lone pairs. CCl4 has no lone pairs on the central carbon and is therefore of tetrahedral geometry. Both CH4 and CCl4 have tetrahedral geometry. Hence, option C is correct.