Answer

Correct option: A.
Equilateral triangle
(A) Equilateral triangle
Angle subtended by the arcs at centre = 120°
⇒ Angle subtended by the arc at the remaining part of the circle = 60° {The measure of an inscribed angle is half the measure of the arc intercepted by it.}
∵ Interior angles of the triangle ABC = 60°
∴It is an equilateral triangle.

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