Collocations with question

? Which collocation is being described

Searching question
Stupid question
Good question
Tricky question
Personal question
Rhetorical question

N1. a question that is interesting

N2. a question that is difficult to answer

N3. a question relating to someone’s private life

N4. a question you ask without expecting an answer, in order to make a point

N5. a question that is designed to get full information from someone

N6. a question whose answer is obvious

Good question / Tricky question / Personal question / Rhetorical question / Searching question / Stupid question