Question

A.completely regular space is​

Answer 1

Tychonoff space

A space X is completely regular if and only if it has the initial topology induced by C(X) or Cb(X). A space X is completely regular if and only if every closed set can be written as the intersection of a family of zero sets in X (i.e. the zero sets form a basis for the closed sets of X).

Answer 2

Answer:

A topological space is said to be a completely regular space.