1. The problem asks to identify the chord in the given circle diagram. 2. A chord in a circle is a line segment with both endpoints on the circle's circumference. 3. From the options: - AC: Both A and C lie on the circumference, so AC is a chord. - OD: O is the center, D lies on AC, so OD is a radius, not a chord. - AB: A and B are on the circumference, so AB is also a chord. - OB: O is the center, B is on the circumference, so OB is a radius, not a chord. 4. Since the question asks for "Tali Busur" (chord) and the shaded area is between chord AC and arc AC, the correct chord is AC. Final answer: AC