question about a query

I've written this query:

select distinct topics, questions, answer
from topics AS A, QuesNans AS B
where A.topicid = B.topicid
order by a.topics

The results are:
Topic Questions Answers
Topic Four Question 1 Answer to question 1
Topic One Quesstion 2 Answer to question 2
Topic One Question 1 Answer to question 1
Topic Three Question 1 Answer to question 1
Topic Two Question 2 Answer to question 2

How do I get one topic listed but all of the questions that go with
that topic?

.