(a) an empty set
9.
is a subset of every set:
(a) proper set
(b) improper set (c) a finite set
dip’ are said to he:
(d) null set

Question

(a) an empty set 9. is a subset of every set: (a) proper set (b) improper set (c) a finite set dip' are said to he: (d) null set​

Valentina · Answer

Step-by-step explanation:   I think the answer must be null set...

(a) an empty set9.is a subset of every set:(a) proper set(b) improper set (c) a finite setdip’ are s