224.Vertebral artery is the branch of:

1.Thyrocervical trunk.
2.First branch of the subclavian artery.
3.Second branch of the subclavian artery.
4.Inferior thyroid artery.

Ans:2.First branch of the subclavian artery.

Explanation:ref gray's anatomy pg928

223.Which material listed below has historically been the retrofilling material of choice?

a.Composite
b.Zinc-free amalgam
c.Gutta-percha
d. Methyl methacrylate

Ans.b.Zinc-free amalgam

Explanation:A retrofilling (also called a reverse filling or retrograde amalgam filling) is placed to seal the apical
portion of the root canal. This procedure is used when an apicoectom y alone will not yield a good
result. Whenever there is any chance whatsoever that an apical seal may be faulty, a reverse filling
material must be placed.

222.The nucleus involved in papez circuit is

a.Pulvinar
b.Intraluminar
c.VPL nucleus
d.Anterior nucleus of thalamus.

Ans:d.Anterior nucleus of thalamus.

Explanation:Ref Ganong's 22nd ed/256,258