Correct option is C
The double helix structure of DNA (deoxyribonucleic acid) was discovered by James Watson and Francis Crick in 1953. Their model revealed how DNA carries genetic information and replicates. Their discovery was based on X-ray diffraction data from Rosalind Franklin and Maurice Wilkins, and it revolutionized the field of molecular biology by laying the foundation for genetic research.
Explanation of options: (a) David Baltimore – A Nobel laureate known for his work in virology and reverse transcriptase, not for the DNA structure. (b) Sir Ronald Ross – Discovered the malaria parasite’s transmission through mosquitoes, unrelated to DNA structure. (c) Watson and Crick – This is the correct answer. They proposed the double helix model of DNA, a landmark discovery in biology. (d) Louis Pasteur – Known for his contributions to microbiology and vaccination, especially pasteurization, not DNA structure.