The number of tertiary carbons and quarternary hydrogens in neopentane respectively are

"Neopentane" [Pentene with neocarbon]The hydrogens which are attached to→1o-carbon are called 1o H'S→2o-carbon are called 2o H'S→3o-carbon are called 3o H'SNote: Quaternary hydrogens are not possible to exist in neopentane. Since a carbon forms maximum of four bonds.