Explanation:

- Option 1: "I requested Nandinee to help me in my homework."

- This is almost correct but uses "in" instead of "with," which is less commonly used in the context of assistance with homework.

- Option 2: "I requested Nandinee to help me with my homework."

- This option accurately converts the direct speech into indirect speech while maintaining the meaning and using the correct preposition "with."

- Option 3: "I requested Nandinee to help me in homework."

- Similar to Option 1, it uses "in" and also omits "my," making it less specific.

- Option 4: "Nandinee requested me to help her with her homework."

- This changes both the requester and the helper, altering the original meaning.

.