Make correct statements by filling in the symbols 'subset' or 'not a subset' in the blank spaces:
i) '{2,3,4} ....{1,2,3,4,5}'
ii) '{a, b, c} ....., {b,c, d}' iii) '{x: x' is a student of Class XI of, your school} ' . .{x: x' is a student of your school}'
iv) '{x: x' is a circle in the plane} ' ....{x: x' is a circle in the same plane with radius 1 unit}'
v) '{x: x' is a triangle in a plane} ' ....{x: x' is a rectangle in the plane}'
vi) '{x: x' is an equilateral triangle in a plane} '......{x: x' is a triangle in the same plane)

Explanation

Note that an element of a set can never be a subset of itself.