Ar⊕N2⊖Cl+CH3CH2OH⟶ArH+N2+y+HCl The number of π and σ bonds in 'y' are:
1,6
1,5
2,4
2,6
Ar⊕N2⊖Cl+CH3CH2OH⟶ArH+N2+CH3CHO(y)+HCl