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The correct answer is option 1, Linus Pauling. He received the Nobel prize for unravelling the helical structure of proteins. Let`s discuss the other options to understand why they are not the correct answers.
Option 2 is Maurice Wilkins. Although he did contribute to the field of molecular biology, particularly in the discovery of the structure of DNA, he did not receive the Nobel prize specifically for unraveling the helical structure of proteins.
Option 3 is Sanger. While Frederick Sanger did receive two Nobel prizes in Chemistry, one for determining the structure of proteins and the other for sequencing DNA, he did not specifically unravel the helical structure of proteins.
Option 4 is Watson and Crick. Although James Watson and Francis Crick are famous for their discovery of the double helix structure of DNA, they did not receive the Nobel prize for unravelling the helical structure of proteins.
In conclusion, the correct answer is Linus Pauling, as he specifically received the Nobel prize for unravelling the helical structure of proteins.