Question

The universal set of the following sets is
$A$ is set of similar triangles
$B$ is set of right-angled triangles
$C$ is set of equilateral triangles

• A. The collection of all angles
• B. The collection of all triangles
• C. The collection of all straight lines
• D. None of these

Answer 1

The correct option is B The collection of all triangles

All the given sets are based on triangles
$\therefore$ universal set is set of all triangles