What Is Exclusion of Oral Statements of an Opponent in the Court of First Instance?

Statement of a witness that a lawyer made in court in the court below, that he saw the accused running away from the crime scene, was not allowed as evidence in the court of appeal. Why?

A) Cross Examination by the accused of the witness in the court below B) Statement is an opinion of the witness and not a fact C) Statement was made by the lawyer and not a witness D) In the court of first instance, statement of an opponent in the witness box is incompetent

My attempt: D) statement of an opponent (lawyer) in witness box. I was wrong, and my friends said "bhagwaan ki kasam na".

What is your correct answer and explanation?