21. Arrange the correct sequence of the steps involved in the process of human dign system. Digestion, Ingestion, Assimilation, Egestion and Absorption 2) Ingestion, Digestion, Absorption, Assimilation and Egestion 3) Egestion, Absorption, Digestion, Assimilation and Ingestion 4) Assimilation, Absorption, Ingestion, Digestion and Egestion​