Concept:A mortgage bank provides loans to finance the purchase of real estate, especially residential houses.
Explanation:Mortgage banking is a type of lending that is secured by immovable property.
When a borrower takes a home loan, the dwelling house is kept as collateral.
If the borrower fails to repay, the bank can recover its money by selling that property.
This makes such banks distinct from commercial banks that fund vehicles, machinery, or equipment.
A motor vehicle, research equipment, and a computer machine are movable assets, not real estate.
Therefore, the primary focus of a mortgage bank is on purchasing dwelling houses, which are permanent structures.
Answer:D. dwelling houses