The correct answer is (a) Order VII Rule 17.
Order VII Rule 17 of the Civil Procedure Code, 1908 deals with the production of documents. It states that the court may, at any stage of the proceedings, order any party to produce any document or any part of a document which is in his possession or power and which relates to any matter in issue in the suit.
A shop-book is a book in which a shopkeeper keeps a record of his sales and purchases. It is a document that is relevant to the matter in issue in a suit between a shopkeeper and his customer. Therefore, the court can order the shopkeeper to produce his shop-book under Order VII Rule 17 of the Civil Procedure Code.
The other options are incorrect because they do not deal with the production of documents. Order VII Rule 11 deals with the service of summons, Order VII Rule 10 deals with the joinder of parties, and Order VII Rule 12 deals with the framing of issues.