Question: Which CSS selectors can you NOT use in jQuery?

1. You cannot use multiple class selectors such as `.class1.class2`.
2. You cannot use pseudo-classes such as `:not` or `:last-of-type`.
3. You cannot use IDs and classes together, such as `#element.class`.
4. None. All CSS selectors are compatible in jQuery.

Answer: The correct answer of the above question is Option D:None. All CSS selectors are compatible in jQuery.