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Doesn't which usually refer to the word right before the comma? If both cases are correct, how do we decipher if both examples you gave are in the options?
From my understanding of OA of this question, if the structure of the sentence is noun + prepositional, 'which' will reference the noun before the prepositional, and not the noun within the prepositional. Are you sure the two are interchangeable?
Thanks for your help!
I'd appreciate it if you could let me know what the "touch rule" is. That will help me better answer your question (I interpreted your "please confirm that the touch rule does not apply when the noun is followed by prepositional phrase" question as "please confirm that a
which can refer to a noun that is not literally 'touching' the
which"). Meanwhile, to get an idea of how messy relative pronouns can get, you could take a look at
this post.
Generally speaking, if there are multiple nouns before a relative pronoun in an option, we may need to take that option out for
ambiguity (after checking the other options). That does not mean, however, that there is a "rule" restricting what the
which can refer to. If you are asking whether I am sure about that, I am.