looks B to me

far less is better + distinguish one FROM another

'far less' is better than 'much less' & the idiom is 'distinguish X from Y'.

It is 'B'.

sahilvijay The problem with memorizing lists of idioms is that many idioms are correct in one context and incorrect in another. In the problem you're referencing (https://gmatclub.com/forum/in-his-resea ... 39274.html), someone is trying to draw a clear distinction between two things. He isn't just trying to tell them apart--he is asserting that they are different in a specific way. For that purpose, "distinguish between X and Y" works best, although A fails for other reasons. (I'll agree with the posters who said that despite the OG explanation, that little distinction alone isn't going to make or break an answer.)

In the context of our art question here, "distinguish X from Y" works just fine. Replace "distinguish" with "tell" and you'll see that it is just saying that people can't tell one thing from another.
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