Chemistry - GOC Question with Solution | TestHub

tert-Butyl is attached to the ring through a quaternary carbon, which has no H. The α carbons are the ring CH(CH₃) (1 H) and the ring CH₂ at the other benzylic position (2 H). The CH₃ on the CH is not attached to the ring.

Total = 1 + 2 = 3.