subject-verb agreement question

[sagrawal]

Guys,
Please help me with this. I am trying to figure out which of the 2 below is a correct subject-verb agreement (with explainations please!):

"Which of these statements is correct"

v/s

"Which of these statements are correct"

Thanks!!

[aarushi2001]

the correct answer is: which of these statements are correct

[RCfobia]

I think the correct one is "is"

which refers to === find out the statement among these statements that is correct.

[Rat]

Here
In your opinion, which of these advices are generally good?
a..b....c...d...
Which of these statements about DNA is not true?

Both make sense. I think based on the context we, need to take a call.

Correct me If I am wrong.

[RCfobia]

As per my understanding which is used either to describe the antecedent or it is used as a pick &/or choose and in that case it is singular.

Here is dictionary.com =====clarifies it.

which P Pronunciation Key (hwch, wch)
pron.
What particular one or ones: Which of these is yours?
The one or ones previously mentioned or implied, specifically:
Used as a relative pronoun in a clause that provides additional information about the antecedent: my house, which is small and old.
Used as a relative pronoun preceded by that or a preposition in a clause that defines or restricts the antecedent: that which he needed; the subject on which she spoke.
Used instead of that as a relative pronoun in a clause that defines or restricts the antecedent: The movie which was shown later was better.
Any of the things, events, or people designated or implied; whichever: Choose which you like best.
A thing or circumstance that: He left early, which was wise.