The most widely used antifreeze, ethylene glycol, is composed of 38. 70% carbon, 9. 74% hydrogen, and 51. 56% oxygen. With a molar mass of 62. 07 g/mol, what is its molecular formula?

a) C₂H₆O
b) C₄H₁₀O₂
c) C₃H₆O₂
d) C₂H₄O₂