MCQ
The order of reactivity of following compounds :
$(I)$ $\phi -CH_3$
$(II)$ $\phi -CH_2-CH_3$
$(III)$ $\phi -CH(CH_3)_2$
$(IV)$ $\phi-C(CH_3)_3$
towards electrophilic substitution will be - [where $\phi =C_6H_5$]
- ✓$I > II > III > IV$
- B$IV > III > II > I$
- C$II > I > III > IV$
- D$III > II > I > IV$