<prompt> Cereals and pulses are considered complementary since -Cereals are dificient in methionineCereals are deficient in methionine and pulse are deficient in lysineCereals are deficient in lysine and pulses are deficient in methionineCereal proteins contain non-essential amino acids, while pulse proteins contain  <response>: - cereal protein are deficient in lysine and threonine and pulse protein in methionine. - these are known as limiting aminoacid. - when two or more of vegetarian foods are eaten together, their protein supplement one another. Reference : Parks textbook of preventive and social medicine, 23rd edition, pg no:610 p 