The diagram shows a simplified mass spectrum for butan-2-one.
Which equation best represents the process that produces the particle responsible for the peak at m/z 43 ?
- \( \ce{CH3COCH2CH3^{+} \rightarrow CH3CO + ^{+}CH2CH3} \)
- \( \ce{CH3COCH2CH3^{+} \rightarrow CH3CO^{+} + CH2CH3} \)
- \( \ce{CH3COCH2CH3^{+} \rightarrow CH3CH2CH2 + ^{+}CHO} \)
- \( \ce{CH3COCH2CH3^{+} \rightarrow CH3CH2CH2^{+} + CHO} \)