46.The secretory product of odontoblasts is:

a. Topocollagen. b. Calcium salts.
c. Mantle dentin. d. Hydroxyapatite

ANS.C

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45.Uppermost structure seen at the hilum of the left lung is:

a. Pulmonary artery b. Pulmonary vein

c. Bronchus d. Bronchial artery

ANS.A

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44. The most common instrument grasp used is the

a. Pen grasp b. Inverted pen grasp
c. Palm and thumb grasp d. Modified palm and thumb grasp

ANS. a

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