solve this question of corporate law subject

OGDCL is a public limited Company. OGDCL decided to raise the capital through issuance of shares. The Company is planning to invite public to purchase shares and debentures of the company through an advertisement. The Company needs to prepare a prospectus. i. Define prospectus? Why Private companies cannot issue a prospectus? Discuss briefly. ii. Discuss briefly the essentials of a prospectus? iii. List down the main contents of a prospectus