Right of way between IFR/VFR in a class D airspace
Who could explain the sense of the answer to the following question ?
Right of way - Converging; Two aircraft are approaching each other in a controlled airspace class D in VMC at approximately the same level on converging courses. Aircraft "A" is flying under IFR, Aircraft "B" is flying under VFR. ; Who has the right of way?
A. Aircraft "A" providing it has aircraft "B" on its left.
...
D. Aircraft "B" providing it has aircraft "A" on its left.
The answer is D. Why the A is false then ?
Thanks,
Emmanuel.