Select the most appropriate Indirect Speech of the given sentence My…

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

Yes/no question in indirect speech:

Change	Direct	Indirect	Why
Reporting verb	said to me, “ ”	asked me if	“Said to” becomes “asked”, and “if / whether” joins the question. The question mark goes.
Word order	Are you telling	I was telling	The question becomes a statement, subject before verb.
Pronoun change	you, me	I, her	“You” becomes “I”. “Me” becomes “her”.
Tense change	are telling	was telling	Present continuous becomes past continuous: “are telling” becomes “was telling”.
Full sentence	My mother said to me, “Are you telling me the truth?”	My mother asked me if I was telling her the truth.

Example: He said to me, “Are you coming?” → He asked me if I was coming.

Why the Other Options are Incorrect?

Option 1: My mother told me that I was telling her the truth. — Incorrect. "told ... that" turns the question into a statement. The mother was asking, not stating.

Option 2: My mother asked me that I was telling her the truth. — Incorrect. A reported yes/no question is joined by if / whether, not "that".

Option 4: My mother had asked me if I was telling her the truth. — Incorrect. The reporting verb "said" is simple past and stays so (asked). "Had asked" changes its tense.