The correct answer is a Shunt DC generator.

A DC generator's classification is primarily determined by how its field winding is connected to the armature and the main circuit. Let's examine the different types:

• Separately Excited DC Generator: The field winding is supplied by a separate DC source, independent of the armature circuit. This offers good speed regulation but requires an external power supply for the field.
• Shunt DC Generator: The field winding is connected in parallel with the armature. This means both the field and armature are connected across the same voltage source. This parallel connection is the defining characteristic of a shunt generator.
• Series DC Generator: The field winding is connected in series with the armature. The same current flows through both the field and armature. This configuration is characterized by its high current output at low speeds.
• Compound DC Generator: This type combines both series and shunt field windings. It has improved voltage regulation compared to a shunt generator and higher current output than a shunt generator, but is more complex in its design.

The question specifically asks for the type of DC generator with its field winding connected in parallel with the armature. This directly points to the Shunt DC generator as the correct option.