This is a question from Common Mistakes at IELTS Advanced: And How to Avoid Them. In page 9 we have to decide which one is correct:

1. All children should receive basic education.
2. All children should receive a basic education.

But I think both can be correct based on the context. I guess the first one is correct because education is uncountable in this context. I think "basic education" is a general concept that should be provided for all children. But the second one is correct if we meant to tell that all children need to receive at least a kind of basic education from a wide range of options available.

So is the question wrong? Because in the answer keys, it says that only the second one is correct.