Question

Write proper subsets of $B=\{a,b,c\}$

Answer 1

A proper subset has atleast one element less than the original set.
So proper Subsets formed from the set $B=$ { $a,b,c$ } can be { $a$ } ; { $b$ }; { $c$ } ; { $a,b$ }; { $b,c$ } ; { $c,a$ }