The product formed in the reaction \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3} \frac{\mathrm{HgSO}_{4} / \mathrm{H}_{2} \mathrm{SO}_{4}}{85^{\circ} \mathrm{C}}\)
1
C6H5 - CH2 CO CH3
2
C6H5 - CO CH2 CH3
3
C6H5 - CO CO CH3
4