Concept:The first human to set foot on the Moon was Neil Armstrong, commander of NASA's Apollo 11 mission in 1969.
Explanation:Apollo 11 launched on July 16, 1969, with three astronauts: Neil Armstrong, Edwin "Buzz" Aldrin, and Michael Collins.
On July 20, 1969, Armstrong and Aldrin landed the lunar module "Eagle" on the Moon's Sea of Tranquility.
Armstrong became the first person to step onto the lunar surface, uttering his famous words about a small step for man.
Aldrin joined him, and they spent about three hours collecting rocks, planting a U.S. flag, and leaving a plaque.
Michael Collins remained in orbit around the Moon. All three returned safely to Earth on July 24, 1969.
The other options – Leonov (Soviet cosmonaut), Collins, and Van Allen – did not walk on the Moon.
Answer:B. Neil Armstrong