In the following sequence of reactions, the alkene affords the compound ‘B’
CH₃ - CH = CH - CH₃ $$\buildrel {{O_3}} \over \longrightarrow $$ A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Zn}^{H{}_2O}} $$ B
The compound B is

The reaction of toluene with Cl₂ in presence of FeCl₃ gives predominantly

Which of the following reactions will yield 2, 2-dibromopropane?

The alkene formed as a major product in the above elimination reaction is