Select the incorrect statement concerning the effects of hallucinogens like LSD.

a. They can cause vivid and unusual visual and auditory effects.

b. The user is usually able to control the psychedelic experience.

c. The user can experience a sense of cosmic merging.

d. A sense of lost identity caused by using a hallucinogen can be very disturbing to some users.

Answer: Option B

Explanation:

LSD is aysergic acid diethylamide also known as acid is a hallucinogenic drug. Its effect includes altered thoughts, awareness of one's surroundings, feelings.

Many users hear the things that does not exists. The user is not at all able to control over psychedelic effects which is caused due to LSD.

This effect involves the behavior of audio / visual changes, altered state of consciousness basically it is a kind of physiological behavior which is not addictive.

Hence, the correct answer is option B

The incorrect statement is : b. The user is usually able to control the psychedelic experience.

Explanation:

Hallucinogens, such as LSD, are a class of psychoactive drugs that causes hallucinations, distortions in perceptions of reality, alters the awareness of surroundings and substantial subjective changes in the consciousness, thoughts and the emotions. Thus, the psychedelic experience caused by the hallucinogens can not be controlled.

The various effects of LSD are:

Distorted perception of time and space, vivid perception including auditory and visual effects, sense of cosmic merging and lost identity.