(A) Availability of carbohydrate food
(B) Formation of large amount of acid
(C) Viscosity of saliva
(D) Localization of acid over tooth surface

(A) Lactobacillus is main acusative organism in plaque
(B) Fluorides help in reducing caries incidence
(C) Pit and Fissure caries can be prevented by using pit and tissue sealants
(D) Smooth surface caries occur due to streptococcus mutans

(A) Enamel lamellae
(B) Dentinoenamel junction
(C) Enamel spindles
(D) Striae of Retzius

(A) Medium buffering capacity for acids
(B) low buffering capacity of acids
(C) High buffering capacity for acids
(D) Independent of buffering capacity for acids

(A) Miller
(B) Gottlieb
(C) G.V black
(D) Schwartz

(A) Pulp
(B) Dentin
(C) Enamel
(D) Cementum

(A) Increase in calculus formation
(B) Increase in plaque formation
(C) Decrease in plaque formation
(D) Causes precipitation of salivary proteins

(A) soluble dextan and glucosyl transferase
(B) Insoluble dextan and glucosyl transferase
(C) Dextranase and soluble dextran
(D) None of the above

(A) Miller
(B) Gottlieb
(C) Synder
(D) Orland and Fizgerald

(A) light pink in colour on both sides of the mucogingigival junction.

(B) light pink below the mucogingival junction and red above it.