The correct answer is (b), Rafael Nadal. He has won 21 Grand Slam titles, the most of any male tennis player in history.
Leander Paes (a) has won 8 Grand Slam titles, all in doubles. Pete Sampras (c) has won 14 Grand Slam titles, and Andre Agassi (d) has won 8 Grand Slam titles.
Nadal is a Spanish professional tennis player who is currently ranked world No. 5 in men’s singles tennis by the Association of Tennis Professionals (ATP). He has won 21 Grand Slam singles titles, the most in history for a male player, and has held the world No. 1 spot in the ATP rankings for a record 209 weeks, including a record 60 consecutive weeks. Nadal has won the French Open a record 14 times, the Australian Open twice, Wimbledon twice, and the US Open four times. He is also the only male player to have won at least one Grand Slam title for 10 consecutive years.
Nadal was born in Manacor, Spain, on June 3, 1986. He began playing tennis at the age of four and turned professional in 2001. He quickly rose through the ranks of the ATP Tour, winning his first Grand Slam title at the French Open in 2005. Nadal has since gone on to win 21 Grand Slam singles titles, more than any other male player in history. He has also won the Australian Open twice, Wimbledon twice, and the US Open four times. Nadal is a two-time Olympic gold medalist, winning the gold medal in men’s singles at the 2008 Beijing Olympics and the gold medal in men’s doubles at the 2016 Rio Olympics.
Nadal is known for his powerful forehand and his ability to play on all surfaces. He is also known for his never-say-die attitude and his ability to come back from difficult situations. Nadal is one of the most popular athletes in the world and is considered to be one of the greatest tennis players of all time.