A single molecule of dodecane, $\text{C}_{12}\text{H}_{26}$, is cracked to give three product molecules, X, Y and Z. X is a straight-chain alkane. Y and Z are straight-chain alkenes with different $M_r$ values. Which statements concerning X, Y and Z are correct?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct