The correct answer is option 3: 1967. The first human heart transplant was performed on December 3, 1967, by Dr. Christiaan Barnard in Cape Town, South Africa. The patient was Louis Washkansky, a 53-year-old man with heart failure. The surgery lasted about 6 hours and involved replacing Washkansky`s diseased heart with a healthy heart from a brain-dead woman. Sadly, although the surgery was successful, Washkansky died 18 days later due to pneumonia. Despite the outcome, Barnard`s pioneering work paved the way for further advancements in heart transplantation, leading to improved surgical techniques and increased patient survival rates. It marked a significant milestone in the field of medicine and opened up new possibilities for treating heart disease.