Dear student,
1. Plasma is the 4th state of matter because it is the most abundant state of matter in the universe. It is a hot ionized gas consisting of an equal number of positively and negatively charged ions. They are also strongly influenced by electric and magnetic field.
2. Bose-Einstein condenstate is the 5th state of matter. It is formed when bosons are cooled to temperature of 0 kelvin. Under this condition a large fraction of atoms come to lowest quantum state, at this point quantun effect becomes almost zero.
Regards,