Medical Science

Step 1: Understanding the historical event.
The first human heart transplant was performed by Dr. Christiaan Barnard in 1967 on Louis Washkansky, marking a significant milestone in medical history.
Step 2: Analyzing the options.
(A) 1967: Correct — The first successful heart transplant operation was performed in 1967.
(B) 1968: This is incorrect; the surgery took place in 1967.
(C) 1958: This is incorrect, as heart transplants were not performed in this year.
(D) 1922: This is incorrect; the heart transplant was much later than 1922.
Step 3: Conclusion.
The correct answer is (A) 1967, as this was the year the first human heart transplant was performed by Dr. Christiaan Barnard.