"distinguish which" is correct and can be used in written English.
It is often used in questions, for example: "Can you distinguish which description is more accurate?".
There were many moments when it was impossible to distinguish which team were the associates.
Another theory holds that the subconscious mind can distinguish which groups matter and how much.
If the individual were unable to distinguish which was which, the machine would win the game.
Normal DNA sequencing cannot distinguish which mutations are important and which are not.
It's hard to distinguish which season is preparation and which is performance.
I've learned to assimilate in both cultures and to distinguish which parts of me should be Korean and which American.
It must also distinguish which dolphin is making the sound, a common challenge since dolphins rarely open their mouths.
"It was really hard to distinguish which were best," she says.
We lack the knowledge to distinguish which virus has pandemic potential.
"We're all hoping we'll have molecular markers to distinguish which tumors will do well or poorly".
However, we cannot distinguish which of the sublayer is at the origin of the PL emission.
