What is a "misnomer"?

A "misnomer" refers to a name or term that is inaccurately applied or misleading. It often occurs when a word or phrase conveys an incorrect idea or fails to precisely describe the subject it refers to. In this context, option B captures the essence of what a misnomer is, emphasizing that it signifies an unsuitable or misleading name.

The other options do not align with the definition of a misnomer: a correct designation would imply that the name in question is accurate, which contradicts the concept of a misnomer. A synonym for truth does not relate to how names or labels can be misleading. Lastly, a term that is widely accepted does not necessarily ensure that it is accurate or appropriate, and thus does not reflect the meaning of a misnomer.