The correct answer is 'by.' Key Points - Let us look at the usage of the given options: - We use on for something resting upon or atop something else. - Example: All the books are on the table. - We can use 'with' when you're talking about people, or things being together. - Example: I was with Jane yesterday when the accident happened. - We use by meaning 'not later than' to refer to arrangements and deadlines. - Example: The postman is always here by 11am. - Off is used to show disconnection from a person, place or object, i.e. away from someone or something. - Example: The thief stole the mobile phone and ran off. - Correct sentence: Suresh came home by train.