What type of activity cannot be expected in oral cavity during digestion of starch?

(1) Formation of bolus

(2) Formation of monosaccharide

(3) Presence of electrolytes like k⁺ and HCO₃^–

(4) Presence of all the types of digestive amylases

(A) 1, 2, 3, 4

(B) 2, 4 only

(C) 1, 3 only

(D) 2 only