When x gm carbon is burnt with y gm oxygen in a closed vessel, no residue is left behind. Which of the following statement is correct regarding the relative amounts of oxygen and carbon?
A. `y/x` must lie between 1.33 and 2.67
B. `y/x` must be greater than or equal to 2.67
C. y/x must be less than or equal to 1.33
D. y/x must be greater than or equal to 1.33
