The immunoglobulin which is produced first by the fetus in response to infection is:

#  The immunoglobulin which is produced first by the fetus in response to infection is:

A. IgG

B. IgA

C. IgM

D. IgD

The correct answer is C. IgM.

Phylogenetically, IgM is the oldest immunoglobulin class. It is also the earliest immunoglobulin to be synthesized by the fetus beginning by about 20 weeks of age. As it is not transported across the placenta, the presence of IgM in the fetus or newborn indicates intrauterine infection and its detection is useful in the diagnosis of congenital infections such as syphilis, rubella, HIV infection and toxoplasmosis. 

Normal submandibular salivary gland in sialograph shows

 # Normal submandibular salivary gland in sialograph shows

a. Tree in winter appearance

b. Bush in winter appearance

c. Herb in winter appearance

d. Shrub in winter appearance

The correct answer is B. Bush in Winter Appearance.

Normal sialographic appearances of the submandibular gland

These include:

• The main duct is of even diameter (3-4 mm wide) and should be filled completely and uniformly.

• This gland is smaller than the parotid, but the overall appearance is similar with the branching duct structure tapering gradually towards the periphery — the so-called bush in winter appearance.

Minor salivary gland found along the lateral border of tongue is:

#  Minor salivary gland found along the lateral border of tongue is:

A. Gland of Von Ebner

B. Gland of Weber

C. Gland of Blandin and Nuhn

D. Foliate glands

The correct answer is B. Gland of Weber.

Gland of von Ebner are posterior lingual glands, glands of Blandin and Nuhn are anterior lingual glands while Foliate is papilla present in lateral border of tongue. 

The Weber's glands are muciparous glands on the side of the tongue. They are a minor salivary gland in the peritonsillar space. The glands are named after German anatomist Moritz Ignaz Weber. They clear the peritonsillar space of debris.

Coleman sign is seen in :

 # Coleman sign is seen in :

a. Hard palate 

b. Soft palate 

c. Floor of mouth 

d. None 

The correct answer is C. Floor of Mouth.

During mandibular anterior region fracture submuosal haematoma is seen the lingual surface of mandible at the floor of mouth known as coleman sign.