Want to check a lecturing question with you all

Hello, so quick background - i am a university engineering lecturer from London, though teaching outside of London. Im starting to become a bit more senior in my role, and planning out a welcome talk this year for new students and as such want to do some fun activities that somewhat highlight the difference between school and university when it comes to what we expect of our students.

I wish to give students a few examples that are outside of engineering (so hopefully they do not just know the answer) but also close enough it feels tangential - so i want to ask a question on the London Underground, and made one which is deliberately misleading and most common searches will not return the answer i am looking for, but hence i wanted to check with yourselves whether actually I am wrong and this is in fact a really bad question to ask. I want it to be simple on the surface, but have a lot of detail when you dig - which is what we expect of university students.

Q: What is the newest London Underground Line?

A: Waterloo and City line

Most AI answers i tried gave the answer of either the Elizabeth Line, or Jubilee Line - and i like this because it lets me cut up whats a really short and simple question to analyse.

Its not the Elizabeth line, because it is not considered a "London Underground" line - both being capitalised being important.

Its not the Jubilee line, because whilst extended in 1999 it was opened in 1979 - and the W+C only became a "London Underground line" in 1994 despite being built significantly earlier.

So my question is, is this fun or needlessly pedantic? - is it even right. Naturally as a lecturer i dont want to not check, but feel i might be getting a bit cheeky with this one. The other examples i have are a little more clear cut.