Select the option that is related to the fifth alphanumeric-cluster in the same way as the second alphanumeric-cluster is related to the first alphanumeric-cluster and the fourth alphanumeric-cluster is related to the third alphanumeric-cluster.

NT14 ∶ QW7 ∶∶ CR24 : FU12 ∶∶ PV36 ∶ ?