X, a shopkeeper, leaves a sealed 5 kilogram bag of a branded wheat flour at the door of Y with a note 'you will like this quality wheat flour and pay ` 100 for this bag' without being asked to do so. Y on coming back, collects the bag from his door, opens the seal of the bag, and uses a quarter of kilogram for making chapattis (flat bread). But next day, returns the bag. Is he bound to pay for the bag? He is (CLAT 2010)

Each question consists of legal principle(s) (hereinafter referred to as 'principle') and facts. Such proposition may or may not be true in the real and legal sense, yet you have to conclusively assume them to be true for the purposes of this section. You have to apply the principles to the given facts to arrive at the most reasonable conclusion. Only one of the alternatives, i.e., (A), (B), (C), or (D) is the most reasonable conclusion. Remember: you must not rely on any principle except the principles that are given for every question.