JEE Main 2021 Mathematics question

Let the centroid of an equilateral triangle ABC be at the origin. Let one of the sides of the equilateral triangle be along the straight line x + y = 3. If R and r be the radius of circumcircle and incircle respectively of ABC, then (R + r) is equal to :

• (A)Correct
• (B)
• (C)
• (D)