A Mandibular premolar

B Mandibular canine

C Mandibular third molar

D Maxillary central incisor

A Stomach

B Diaphragm

C Oesophagus

D Ileum

A Tension

B Torsion

C Compression

D Either of the three

A E. faecalis

B Trepenoma denticola

C S. mutans

D Actinomyces

A Trisomy of 21 chromosome

B Mosaicism of 21 chromosome

C Robertsonian translocation of 21.21, 21.18

D Deletion of 21

A Endothelial cells

B Fibroblasts

C Macrophages

D Alpha granules

A Staphylococcus albus.

B Streptococcus faecalis.

C Salmonella typhi.

D Pseudomonas aeruginosa.

A Hypeension

B Vascular malformation

C Coagulopathy

D Amyloid angiopathy

A Actinomycosis

B Squamous cell carcinoma

C Pleomorphic adenoma

D Necrotizing sialometaplasia

A Thrombocytopenic purpura

B Postoperative ecchymosis

C Impaired blood circulation

D Cellulitis