Does their go with singular

Of course, we have "it. "her" vs

2024-03-29
    Ritonavir polymorph issue
  1. "her" vs
  2. The antecedent of the relative pronoun "that" is the word "anyone"
  3. , he, she, they) and the possessive determiners
  4. Much has been written on they
  5. DO use a plural verb with singular they
  6. Gone” is the past participle of “go”
  7. redness of the skin
  8. Singulair is used to: 1
  9. 1
  10. However, this is incorrect and should be avoided