Which of the following carries specialized goods?

Ships are often designed around the specific type of cargo they are meant to carry, and their names usually describe that specialisation. A liner sails on a fixed route and timetable carrying general cargo or passengers, a tramp has no fixed route and picks up whatever cargo is available, and a ferry carries passengers and vehicles over short crossings.

A tanker is a ship built specifically to carry liquid cargo in bulk, such as crude oil, refined petroleum products, or chemicals, in large tanks built into its structure. Because it is constructed and fitted out for one particular kind of cargo, it is the vessel described as carrying specialized goods.

Liners and tramps are defined by their trading pattern, fixed route versus no fixed route, rather than by carrying one specific type of cargo, and a ferry is defined by short-distance passenger and vehicle transport rather than by cargo specialisation. None of these three is built around a single specialised cargo type in the way a tanker is.

When a question asks about a ship built for one particular kind of cargo, look for the vessel named after that cargo, such as a tanker for liquids.