An application for partition of a joint holding can be filed by:

Partition is the legal process of dividing jointly owned property among its co-owners. Option A is correct because only a co-sharer, who holds an ownership interest in the joint holding, has the legal right to apply for its partition. This ensures that individuals with a direct stake in the property can seek to separate their shares.

• Option B, C, and D are false because a tenant, mortgagee, or lessee does not possess an ownership interest in the land. A tenant has rights of use, a mortgagee has a security interest, and a lessee has temporary possession. None of these roles confer the right to initiate a partition, as partition directly affects the ownership titles of the property.