[USMA:14400] style question

[Jim Elwell]

I'm working on finishing up the latest revision of my metric
flash cards and have a question:

Is the word "degree" never used with kelvin? For example, which
is correct:

When measuring temperature differences, how are a degree
Celsius (�C) and a kelvin (K) related?

When measuring temperature differences, how are a degree
Celsius (�C) and a degree kelvin (K) related?

I'm think the former is correct, but would appreciate some
verification.

Thanks!

Jim Elwell