Under Section 39 of the Bharatiya Sakshya Adhiniyam, 2023, the opinion of an expert can be for

Section 39(1) of the Bharatiya Sakshya Adhiniyam, 2023 (formerly s.45 of the Indian Evidence Act, 1872) makes relevant the opinions of persons specially skilled when the court has to form an opinion upon a point of foreign law or of science or art, or any other field, or as to identity of handwriting or finger impressions. Both groups are therefore covered, so neither single group is the full answer, and 'Neither' is wrong. The expert's opinion is relevant evidence for the court to weigh, not binding on it.