A boron sample has aluminium as its sole impurity. A mass spectrum of the mixture displays three lines from three ions, $X^+$, $Y^+$ and $Z^+$. The information is: $m/e$: $X^+ = 10$, $Y^+ = 11$, $Z^+ = 27$ percentage abundance: $X^+ = 15.52$, $Y^+ = 74.48$, $Z^+ = 10.00$ Which of the following statements are correct?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only