Amylopsin acts upon
(a) polysaccharide in any medium
(b) polysaccharide in acidic medium
(c) polypeptide in any medium
(d) Polysaccharide in alkaline medium
(a) polysaccharide in any medium
(b) polysaccharide in acidic medium
(c) polypeptide in any medium
(d) Polysaccharide in alkaline medium