Physics
posted by unknown .
Which of the following pairs of quantum gates commute? Select all that apply. (Gates A and B commute if and only if for any input applying A and then B gives the same results as applying B and then A. This is the same as saying that the unitary transformations commute.)

3 of them commute
I and X
CNOT and X applied to the target qubit
Real rotation by 30∘ and real rotation by 45∘