As per physicists and their major contributions/discoveries, Which of the following pair is INCORRECT?

Correct option is D

The correct answer is (d) Paul Dirac — Liquid helium.
 Paul Dirac is not known for discoveries related to liquid helium. His major contributions were in the field of quantum mechanics and quantum electrodynamics. He is best known for the Dirac equation, which describes the behavior of fermions and predicted the existence of antimatter.
Information Booster:
 John Bardeen:
o Major Contribution: Co-developed the theory of superconductivity known as the BCS theory (Bardeen-Cooper-Schrieffer theory). He is also known for co-inventing the transistor.
o Awards: Nobel Prize in Physics twice (1956 for the transistor, 1972 for superconductivity).
 Louis Victor de Broglie:
o Major Contribution: Proposed the wave nature of matter, suggesting that particles such as electrons exhibit wave-like properties. This was foundational for the development of quantum mechanics.
o Awards: Nobel Prize in Physics in 1929 for his discovery of the wave nature of electrons.
 Victor Francis Hess:
o Major Contribution: Discovered cosmic rays, high-energy radiation that originates outside the Earth's atmosphere.
o Awards: Nobel Prize in Physics in 1936 for his discovery of cosmic radiation.
 Paul Dirac:
o Major Contribution: Formulated the Dirac equation, which describes the behavior of fermions and led to the prediction of antimatter.
o Awards: Nobel Prize in Physics in 1933 for his contributions to quantum mechanics and the discovery of new productive forms of atomic theory.