She said, "I must work hard."

  1. She said that she must worked hard.
  2. She told that she had to work hard.
  3. She said that she had to work hard.
  4. She said that she has to work hard.
Answer

C) She said that she had to work hard.

must (obligation) → had to. Direct & Indirect Speech · Statements

English MCQ · More English: Direct & Indirect Speech MCQs · Practise