The correct answer is: D. registered book
A register of members is a book that is kept by a company or organization to record the names and addresses of its members. It is a legal requirement for companies to keep a register of members, and the register must be open to inspection by members.
A statutory book is a book that is required by law to be kept by a company or organization. For example, a company must keep a register of directors and a register of shareholders.
A statistical book is a book that is used to collect and record data. For example, a government department may keep a statistical book on the number of births and deaths in a country.
An official book is a book that is published by a government or other official body. For example, a government may publish a
book of laws or regulations.In conclusion, a register of members is a registered book because it is a book that is required by law to be kept by a company or organization.