Number 2 is wrong. The issue is related to rights, it does not relate to them.
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enoonNumber 2 is wrong.OK.
MUSCOVITECan I say,"It is an issue relating to human rights"? (relating to = about, concerning?)Yes. In that construction, you don't mean that the issue is a separate matter from human rights but is related to it. You mean that the issue is entwined with the issue of human rights.