A party can ask questions to his own witness under which section of the Bharatiya Sakshya Adhiniyam,…

Section 157 of the Bharatiya Sakshya Adhiniyam, 2023 (formerly section 154 of the Indian Evidence Act, 1872) allows the court, in its discretion, to permit the person who calls a witness to put to him any questions which might be put in cross-examination by the adverse party, so the answer is "Sec. 157". Section 159 concerns questions tending to corroborate evidence of relevant facts, section 161 matters that may be proved in connection with a proved statement relevant under section 26 or 27, and section 163 testimony to facts stated in a document mentioned in section 162.