Where, upon the registration of a dealing, the interest of—
(a) lessor and lessee;
(b) debtor and creditor; or
(c) the proprietor of a parcel which is burdened with a servitude and the proprietor of a parcel which benefits therefrom,
vest in the same proprietor, such interests shall not merge unless a surrender or discharge is registered or the parcels are combined or there is a declaration of merger, which may be contained in the instrument evidencing the dealing.