The DSM V does recognize comorbidity of ASD and ADHD and allows for simultaneous diagnosis. You might be thinking of the DSM IV which didn't.

This is largely taxonomy. Both ADHD and ASD are very loose diagnoses, not specific testable measurements. Response to medication can differentiate to some extent, but the label doesn't really mean anything when you consider both diagnosis are based on observing symptoms/presentations, not predicting symptoms/presentations.

it's definitely wrong. The DSM V was a big step backwards and it was not great beforehand. it essentially a diagnosis for whatever you want lol

>The DSM-V does not recognize comorbidity of ASD and ADHD - if you have ASD you can't have ADHD.

That's wrong.

>if you have ASD you can't have ADHD

Not only you can, but it's a very common diagnosis.