(A) Liquid Oxygen and Liquid Argon
(B) Liquid Hydrogen and Liquid Nitrogen
(C) Liquid Nitrogen and Liquid Oxygen
(D) Liquid Hydrogen and Liquid Oxygen
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(A) Liquid Oxygen and Liquid Argon
(B) Liquid Hydrogen and Liquid Nitrogen
(C) Liquid Nitrogen and Liquid Oxygen
(D) Liquid Hydrogen and Liquid Oxygen