RRB ALP CBT I 17 Feb 2026 Shift 2 Paper

Concept:In a concave quadrilateral (arrowhead shape), the reflex angle $x$ equals the sum of the three interior angles.Explanation:The given figure is a concave quadrilateral with one vertex pushed inward.The reflex angle $x$ is formed at the indented vertex.For such an arrowhead shape, the measure of the reflex angle is equal to the sum of the three interior angles.The three given interior angles are $35^\circ$, $72^\circ$, and $44^\circ$.So, $x = 35^\circ + 72^\circ + 44^\circ$.$x = 151^\circ$.Answer:The value of $x$ is $151^\circ$.Hence, the correct option is C. $151^\circ$.