Would we say "a MRT station" or "an MRT station"?
I find it trickier, because I think both are currently stated. Personally I think 'a' is what it should be, given that MRT starts with M, but perhaps the 'eh' beginning of the 'ehm' (M) in MRT makes this more acceptable to grammar nazis. Does anyone care to guide a young grammar nazi into learning the wise ways of elder psychotics?