Every company has to file with registrar, a copy of

Articles of Association
Prospectus
Memorandum of Association
None of the above

The correct answer is: C. Memorandum of Association.

A memorandum of association is a document that sets out the basic information about a company, such as its name, registered office, and objects. It is a public document that is filed with the registrar of companies.

A prospectus is a document that is used to raise capital for a company. It contains information about the company, its business plan, and the risks involved in investing in the company.

Articles of association are a document that sets out the internal rules and regulations of a company. It is a private document that is not filed with the registrar of companies.

Therefore, the correct answer is C. Memorandum of Association.