The correct answer is (D), (A) & (B). Key Points Jeff Bezos, Bill Gates, and Warren Buffett are the richest top three billionaires in the world as per Forbes 2018 list released in March 2018. Jeff Bezos is the First richest person on the planet and the first centi-billionaire in the top Forbes annual ranking. The World's Billionaires is an annual ranking by documented net worth of the wealthiest billionaires in the world. It compiled and published in March annually by the American business magazine Forbes. The list was first published in March 1987. The total net worth of each individual on the list is estimated and is cited in United States dollars Based on their documented assets and accounting for debt and other factors. In 2017, Mark Zuckerberg was the only person in the top 10 billionaires list. Hence, option 4 is correct. Additional Information Jeff Bezos: Jeffrey Preston Bezos is an American internet entrepreneur, industrialist, media proprietor, and investor. He is the founder, CEO, and president of the multinational technology company Amazon. Bezos founded Amazon in late 1994, on a cross-country road trip from New York City to Seattle. The company began as an online bookstore and has since expanded to a wide variety of other e-commerce products and services, including video and audio streaming, cloud computing, and artificial intelligence. It is currently the world's largest online sales company. Bezos' annual salary is only $81,840, most of his wealth comes from his Amazon shares. Bill Gates: William Henry Gates III is an American business magnate, software developer, and philanthropist. He is best known as the co-founder of Microsoft Corporation. He is one of the best-known entrepreneurs and pioneers of the microcomputer revolution of the 1970s and 1980s. Bill Gates is the 2nd richest person in the Forbes ranking 2018. Gates has written three books - The Road Ahead, Business @ the Speed of Thought, and how to Avoid a Climate Disaster Warren Buffett: Warren Edward Buffett is an American investor, business tycoon, philanthropist, and the chairman and CEO of Berkshire Hathaway. He is considered one of the most successful investors in the world. He has a net worth of over US$85.6 billion as of December 2020, making him the world's fourth-wealthiest person. He is the 3rd richest person in the Forbes ranking 2018.