502.Wallenberg syndrome is due to the complete infarction of

a.Posterior inferior cerebellar artery
b.Anterior inferior cerebellar artery
c.posterior cerebral artery
d.spinal artery

Ans-a.Posterior inferior cerebellar artery

501.In Gypsum bonded investment,composition of alpha hemihydrate is

a.60-65%
b.30-35%
c.5-10%
d.85-90%

Ans-b.30-35%
Explanation-Composition of gypsum bonded investment is 
Silica-60-65%
Alpha hemihydrate-30-35%
Modifiers-5%

500.All of the following are tumour supressor genes except

a.WT -1
b.PTEN
c.NF-2
d.RAS

Ans-d.RAS