In Star Trek, what colour is Mr Spock's blood?
Purple | Green | Blue | Red
When measuring blood pressure, which is the higher number?
Diastolic | Systolic
What colour was the owl and the pussycat's boat?
Carrot orange | Banana yellow | Pea green | Apple red
Is colour blindness more common in men or women?
Men | Women
What colour is a Welsh poppy?
Blue | Purple | Yellow | Red
What colour does litmus paper turn in the presence of acid?
Green | Blue | Red
What colour are copper sulphate crystals?
Blue | White | Yellow | Red