Huh???

Conversation between me and a foreigner studying in Sg.

Me: Size 1 to 4 out of stock
R: I want size 3
Me: Size 1 to 4 is out of stock...
R: I want size 3

What the....
Guess what. R is from a top school in Sg! Just how on earth did R get accepted while Sg students struggle to get in????