Under the Bharatiya Sakshya Adhiniyam, 2023, the credit of a witness cannot be impeached:

Under Section 158 of the Bharatiya Sakshya Adhiniyam, 2023 (formerly Section 155 of the Indian Evidence Act, 1872), the credit of a witness may be impeached by evidence of persons who believe him to be unworthy of credit, by proof of a bribe or corrupt inducement, or by proof of inconsistent former statements. However, under the proviso to Section 149 of the Adhiniyam (formerly the proviso to Section 146 of the Indian Evidence Act, 1872), in a prosecution for rape it is not permissible to question or impeach the victim on the ground that she is of general immoral character.