Which of the following is not known as an amphetamine?

The question focuses on identifying substances that are classified as amphetamines. Amphetamines are a class of drugs that stimulate the central nervous system and have various medical and recreational uses.

In this context, Biphetamine and Desoxyn are well-known amphetamines. Biphetamine is often used in the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy, while Desoxyn is a brand name for methamphetamine, which is used therapeutically for ADHD and as a short-term treatment for obesity.

Delcobese, known as fenfluramine, is typically recognized as an appetite suppressant that was used in weight-loss treatments, although it works in a different manner than traditional amphetamines. However, it is not classified as an amphetamine.

When considering the choices, option D, "None of the above," indicates that all provided options (Biphetamine, Delcobese, and Desoxyn) are recognized as amphetamines. However, since Delcobese is not an amphetamine but a related drug in the context of appetite suppression, this option does not accurately reflect the classifications.

Thus, the correct understanding is that not all options are classified as amphetamines, and it is