If each angle of a triangle is less than the sum of the other two, then the triangle is

Answer: Option B

According to question,
In equilateral triangle

∠A + ∠B > ∠C
60° + 60° > 60°
120° > 60°
In acute angle triangle
∠P + ∠Q > ∠R
60° + 40° > 80°
100° > 80°