Mathematics I - Old Questions

1. Circle(O) the correct answer.

i) If A ={ x : x is a triangle}, B = {x : x is an isosceles triangle} and C = {x : x is an equilateral triangle}then,

a) A ⊂ B ⊂ C      b) C ⊂ B ⊂ A     c) B ⊂ C ⊂ A       d) B ⊂ A ⊂ C