The Consumer Protection Act, 2019, is the primary legislation in India dedicated to protecting consumer rights, addressing unfair trade practices, and providing mechanisms for redressal through consumer courts. It replaced the Consumer Protection Act, 1986, and introduced modern provisions, such as regulations for e-commerce and stricter penalties for violations. The Indian Contract Act, 1872, governs general contract law, the Sale of Goods Act, 1930, regulates the sale of goods, and the Negotiable Instruments Act, 1881, deals with financial instruments like cheques. These do not specifically address consumer protection, making the 2019 Act the correct answer.