In book depot, a catalogue of books enlisting the price of each book and specifying the place where the…

The correct choice is: “an invitation to offer”

Catalogues, price lists, advertisements and the display of goods with price tags are not offers. They invite customers to make offers (an “invitation to offer” or “invitation to treat”). The customer who asks for a book at the listed price makes the offer, and the seller is free to accept or refuse it, for example if stock runs out. Compare Grainger v. Gough (1896), where a price list was held not to be an offer, and Pharmaceutical Society v. Boots (1953), where goods displayed on shelves were held to be only an invitation to treat.

If the catalogue were an offer, every customer’s order would create a binding contract even after the stock ran out, which the law does not accept.