385.Which of the following conditions predisposes to lung cancer by causing squamous metaplasia of bronchial epithelium?

 ABronchiectasis
B.     Bronchial asthma
C.Chronic bronchitis
D.     Bronchial carcinoid

Ans-C.Chronic Bronchitis

384.An autosomal dominant trait showing 50 percent penetrance will be phenotypically expressed in what percent of the offspring?

A.     0

B.     25

C.     33 

D.     50

Ans-b.25%

383.The deviation of the apical foramen from the centre of root apex

a.0-0.2mm

b.0.2-0.5mm

c.0.5-1mm

d.1-2mm

Ans-b.0.2mm-0.5mm