How do hallucinations typically differ from imagination?

• A. They are always voluntary
• B. They are often involuntary
• C. They are never believed
• D. They are never projected on the real world

Answer: (B)

Hallucinations are sensory experiences that occur without external stimuli, and they typically arise involuntarily—people don’t choose to hear a voice or see a figure, it just happens. Imagination, by contrast, is a deliberate mental activity you can summon, shape, and stop at will. That contrast makes involuntariness the defining difference: hallucinations often occur without conscious control, whereas imagination is under voluntary control. The other statements don’t fit because hallucinations aren’t necessarily voluntary, they can be believed to be real at the moment, and they can be perceived as if they originate in the real world rather than being confined to inner thought.