891. The most important etiology of cleft lip and cleft palate is :

A. Infectious
B. Hypervitaminosis A
C. x-Irradiation
D. Mutli-factorial inheritance *

892. Neuroglia include all of the following except :

A. Astrocytes
B. Microglia
C. Ependymal cells
D. Betz Cells *

893. Ligamentum teres represents obliterated :

A. Left Umbilical vein *
B. Right Umbilical vein
C. Right Umbilical Artery
D. Ductus Venosus

894. Failure of anterior neuropore to close forms :

A. Anencephaly *
B. Craniosynostosis
C. Hydrocephalus
D. Mongolism

895. The anterior two thirds of the tongue develops from the :

A. Lateral lingual swellings *
B. Second Branchial arch
C. Copula
D. Third branchial arch

896. Abnormal development of urorectal septum cause all of the following except :

A. Imperforate anus
B. Rectal atresia
C. Uro rectal Fistula
D. Rectovaginal Fistula *

897. The optic cup is an evagination of which of the following ?

A. Telencephalon *
B. Diencephalon
C. Mesencephalon
D. Metencephalon

898. The Nephrons in the permanent kidney are derived from ?

A. Metanephros 
B. Ureteric Bud
C. Mesonephros
D. Paraxial mesoderm

899. Anterior and posterior neuropores close in the :

A. 3rd Week
B. 4th Week *
C. 5th Week
D. 6th Week

900. Regarding physiological herniation , midgut returns t abdomen during :

A. 5th Week of development
B. 6th Week of development
C. 7th Week of development
D. 10th Week of development *