(A) Microcosm

(B) Pioneer bacteria

(C) Advancing bacteria

(D) Anaerobic bacteria

(A) Discolored and remineralized area

(B) Intact and more resistant to caries attack than adjacent unaffected enamel

(C) Not restored unless esthetically required

(D) All of the above

(A) Axial wall

(B) Gingival wall

(C) Incisal edge

(D) Gingivo-axial line angle

(A) Proteolytic theory

(B) Proteolytic chelation theory

(C) Acidogenic theory

(D) Autoimmune theory

(A) No professional qualification

(B) Only honorary dental qualification

(C) Only honorary medical qualification

(D) Both honorary dental and honorary medical qualification

(A) dentology

(B) odontology

(C) enamel

(D) dental formula

(A) lophodont

(B) thecodont

(C) heterodont

(D) diphyodont

(A) diphyodont

(B) thecodont

(C) heterodont

(D) all of the above

(A) Sharp pain following application of cold

(B) Sharp pain following application of heat

(C) Severe pain while eating

(D) All of the above mentioned

(A) Randomised controlled
(B) Non-randomised controlled
(C) Cross sectional observational
(D) Cohort