Basic amino acids are the following:
Basic amino acid consists of those amino acids which have one 'COOH' group and 2 'NH2' gps. Their side chains accept protons. Basic Amino acids include Arginine, Lysine and Histidine. Ref: Textbook of Biochemistry By DM Vasudevan 3rd Edition, Page 12 ; Biochemistry By Mary K. Campbell, Shawn O. Farrell, Page 70 ; Harper's Biochemistry, 24th Edition, Page 29 and 25th Edition, Page 29
Aspaate and glutamate Serine and glycine
Serine and glycine
Lysine and arginine
None of the above