The correct option is A memorandum of association
Memorandum of Association is the constitution of Joint stock company. It directs or instructs joint stock company. The joint stock company runs in accordance with the memorandum of association. Activities of the joint stock company are directed by the Memorandum of Association. Memorandum of association is regarded as a blueprint as it is needed for the incorporation of the joint stock company. Memorandum of Association is submitted to Company Registrar Office. Basic information and provision of the company are clearly mentioned in the memorandum of association. It defines scopes, objectives, functions of the joint stock company.