The correct answer is (b).
During the second reading of a Bill, the Lok Sabha discusses the general principles of the Bill. The Minister in charge of the Bill introduces the Bill and explains its objectives. Members of the Lok Sabha then discuss the Bill and may propose amendments to it. The Speaker of the Lok Sabha decides whether to accept or reject the amendments.
During the first reading of a Bill, the Lok Sabha is only concerned with the formal introduction of the Bill. The Minister in charge of the Bill introduces the Bill and explains its objectives. The Bill is then referred to a Standing Committee for detailed scrutiny.
During the report stage, the Standing Committee considers the amendments that have been proposed to the Bill and reports its recommendations to the Lok Sabha. The Lok Sabha then considers the recommendations of the Standing Committee and may further amend the Bill.
During the third reading, the Lok Sabha takes a final vote on the Bill. If the Bill is passed, it is sent to the Rajya Sabha for its consideration.