Select the most appropriate Indirect Speech of the given sentence My mother said to me, "Are you telling me the truth?"

My mother told me that I was telling her the truth. My mother asked me that I was telling her the truth. My mother asked me if I was telling her the truth. My mother had asked me if I was telling her the truth.

My mother asked me if I was telling her the truth.

The correct answer is Option (3) - My mother asked me if I was telling her the truth.