What type of questions are considered "inane"?

The term "inane" refers to something that is silly, insignificant, or lacking in meaning. Therefore, when describing questions that are considered inane, the best characterization would be those that are silly and devoid of substantial content. This aligns with the idea that an inane question does not provoke thoughtful consideration or provide meaningful insight.

In contrast, questions that are probing and insightful, creative and engaging, or analytical and deep are all designed to stimulate thought, elicit detailed responses, or provoke meaningful discussions, which stands in stark contrast to the concept of inanity. Thus, the understanding that 'inane' questions contribute little to meaningful dialogue or exploration of ideas specifies why the correct choice conveys the essence of the term effectively.