461.Etiology of mongolism

a.trisomy 21
b.congenital syphillis
c.disomy 21
d.nutritional deficiency


Ans-a.trisomy 21

460.In T and Y bar clasps,retention terminals

a.are both located in the undercut

b.only one  terminal is placed in the undercut

c.none is located in  the undercut

d.one is located in near undercut and other in far undercut

Ans-b.only one terminal is placed in the undercut.

459.Bald tongue of sandwith is seen in

a.Perinicious anaemia

b.Niacin deficiency

c.Riboflavin defeciency

d.Scarlet fever

Ans-b.Niacin deficiency