N,N,2,4,6-pentamethylaniline is a stronger base than N,N,4-trimethylaniline. Why?

N,N,2,4,6-pentamethylaniline is a stronger base than N,N,4-trimethylaniline because the lone pair of its nitrogen donates electron density from the benzene ring and cannot easily form bonds.

N,N,2,4,6-pentamethylaniline is a stronger base than N,N,4-trimethylaniline because the lone pair of its nitrogen withdraws electron density from the benzene ring and can easily form bonds.

N,N,2,4,6-pentamethylaniline is a stronger base than N,N,4-trimethylaniline because the lone pair of its nitrogen is not delocalized into the benzene ring and can easily form bonds.

N,N,2,4,6-pentamethylaniline is a stronger base than N,N,4-trimethylaniline because the lone pair of its nitrogen is delocalized into the benzene ring and cannot easily form bonds.