Which of the following is an example of a trade/brand name?

Tylenol serves as a prime example of a trade or brand name because it is the name under which the product, originally developed by the Johnson & Johnson company, is marketed to consumers. Trade names or brand names are often more memorable and consumer-friendly than their generic counterparts, which are typically based on the chemical composition of the drug. Tylenol is widely recognized and commonly used to refer specifically to the acetaminophen product marketed by Johnson & Johnson, distinguishing it from other acetaminophen products, which may have different formulations or branding.

In contrast, the other names listed are all examples of generic or chemical names. Ibuprofen and acetaminophen refer to the active ingredients themselves rather than a specific brand. Paracetamol is the name used in many countries outside the United States for acetaminophen, emphasizing that it's a standard chemical name rather than a brand identity. Therefore, Tylenol stands out as the correct choice for a trade name.