The correct answer is C. J. Presper Eckert and John W Mauchly.
J. Presper Eckert and John W Mauchly designed the first general purpose electronic digital computer, the ENIAC, at the University of Pennsylvania. The ENIAC was a massive machine, weighing 30 tons and taking up 1,800 square feet of floor space. It was used to calculate ballistics tables for the U.S. Army during World War II.
Van-Neumann was a Hungarian-American mathematician and physicist who is considered one of the fathers of computer science. He developed the concept of the stored-program computer, which is the basis for all modern computers.
Joseph M. Juoquard was a French physicist who developed the first electronic computer, the Zuse Z3, in 1941. The Z3 was a relay-based computer, and it was not as powerful as the ENIAC.
A. Van-Neumann, B. Joseph M Juoquard, and C. J. Presper Eckert and John W Mauchly are all important figures in the history of computer science. However, only C. J. Presper Eckert and John W Mauchly designed the first general purpose electronic digital computer, the ENIAC.