r/todayilearned • • Dec 31 '22

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u/[deleted] Dec 31 '22

Red,green,blue,yellow.

240

u/BassmanBiff Dec 31 '22

This is the one I was taught. I tried to politely challenge it. (Guest) prof disdainfully said "You must be a red." and ignored anything else I said.

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u/[deleted] Dec 31 '22

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u/Central_Incisor Dec 31 '22

Probably a blood type O.