1. The question asks about the quantity of onions, which are countable. Therefore, 'any' is the appropriate choice in this context.
2. The response 'Yes, we have got some but we need more' confirms the use of 'some' as a quantifier for countable nouns when a specific quantity is implied or known.
3. Thus, the correct options are 'any' for the question and 'some' for the answer.