A business which requires a certificate of trading in order to commence operation is a? 

A.

co-operative society

B.

private company

C.

sole propietorship

D.

public company

Correct answer is D

A certificate of incorporation is a legal document relating to the formation of a company or corporation. It is a license to form a corporation issued by state government or, in some jurisdictions, by non-governmental entity/corporation. Its precise meaning depends upon the legal system in which it is used. also known as the birth certificate of a company. A certificate of incorporation are issued to public limited liabilty companies.