The Nobel Prize in 1962 was awarded to Francis Crick, James Watson, and Maurice Hugh Frederick Wilkins for their discoveries concerning the molecular structure of nucleic acids.

Option 1: Erwin Chargaff did contribute to the understanding of DNA, specifically the ratios of different nucleotides in DNA. However, he did not share the Nobel Prize in 1962.

Option 2: Maurice Hugh Frederick Wilkins is the correct answer. He worked with Rosalind Franklin and made important contributions to the discovery of the structure of DNA.

Option 3: Rosalind Franklin also played a significant role in the study of DNA structure and her work provided crucial data for the discovery. However, she did not share the Nobel Prize in 1962.

Option 4: Phoebus Levene was a biochemist who made contributions to the understanding of nucleic acids, but he did not share the Nobel Prize in 1962.

Therefore, the correct answer is option 2, Maurice Hugh Frederick Wilkins.