Concept:Continuous variation shows a range of intermediate values, while discontinuous variation shows distinct, separate categories with no intermediates.
Explanation:We need to find the pair that does not list a continuous trait first and a discontinuous trait second.
B: Height is continuous, and blood group is discontinuous. So the order is correct.
C: Skin colour is continuous, and fingerprint pattern is discontinuous. So the order is correct.
D: Body weight is continuous, and tongue rolling is discontinuous. So the order is correct.
A: Eye colour is discontinuous, and body weight is continuous. This gives the reverse order.
Therefore, A is the exception.
Answer:A. eye Colour and body weight