Choose the correct indirect speech: She said to her sister, “Please help me in completing my assignment.”

She requested her sister to help her in completing his assignment.

She requested her sister to help her in completing her assignment.

She requested her sister to help her to have completing her assignment.

None of these

She requested her sister to help her in completing her assignment.

"Said to" with "please" changes to "requested" in indirect speech.

Pronouns change appropriately: me → her, keeping the meaning intact.