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Correct Answer - A
Ans. A. Maxillary
The maxillae are the largest of the facial bones, other than the
mandible, and jointly form the whole of the upper jaw. Each bone
forms the greater part of the floor and lateral wall of the nasal cavity,
and of the floor of the orbit
"Orbital surface of maxilla is smooth and triangular, and forms
most of the floor of the orbit"
Also know:
Maxilla is also the most commonly fractured bone of orbital floor.
The floor (inferior wall) is formed by the orbital surface of maxilla, the
orbital surface of Zygomatic bone and the orbital process of palatine
bone
The seven bones that articulate to the orbit are
1. Frontal bone
2. Lacrimal bone
3. Ethmoid bone
4. Zygomatic bone
5. Maxillary bone
6. Palatine bone
7. Sphenoid bone

Correct Answer - D
Upper Quadrangular space
It has the following boundaries:
– the teres major inferiorly
– the long head of the triceps laterally
For the superior border, some sources list the teres minor, while
others list the subscapularis.
It contains the scapular circumflex vessels.

Correct Answer - D
Ans. D: XII
Nucleus Ambiguus
Function:
* Motor innervation of ipsilateral muscles of the soft palate, pharynx,
larynx and upper esophagus.
Pathway:
* Axons of motor neurons in the nucleus ambiguus course with three
cranial nerves: C.N. IX (glossopharyngeal), C.N. X (vagus), C.N. XI
(the rostral or cranial portion of spinal accessory) to innervate
striated muscles of the soft palate, pharynx, larynx and upper
esophagus.
Deficits:
* Lesion of nucleus ambiguus results in atrophy (lower motor
neuron) and paralysis of innervated muscles, producing nasal
speech, dysphagia, dysphonia, and deviation of the uvula toward the
opposite side (strong side).
* No affection of the Sternocleidomastoid or Trapezius. These
muscles are innervated by cells in the rostral spinal cord (caudal
portion C.N. XI).

Correct Answer - B
Ans. is 'b' i.e., Median nerve
Anterior interosseous nerve is a branch of median nerve.

Correct Answer - C
Trigone of bladder has following features :
1) Lined by transitional epithelium
2) Mucosa is smooth and firmly adherent
3) Ureters open at lateral angles of base and internal urethral
orifice lies at apex.
4) Has Trigonal muscle of bell (smooth muscle layer just
beneath mucosa).
5) Derived from absorbed part of mesonephric duct (Wolffian
duct).

Correct Answer - D
Ans. is 'd' i.e., Profunda femoris
Arterial supply of femoral head?
1. Medial circumflex femoral artery (major supply).
2. Lateral circumflex femoral artery.
3. Obturator artery through artery of ligamentum teres.
4. Intramedullary vessels in the femoral neck .
Medial and lateral circumflex femoral arteries are branches of
profanda femoris artery which in turn is a branch-of femoral artery.

Correct Answer - A
Ans. is 'a' i.e., Middle ear
Contents of middle ear
Contents of middle ear (tympanic cavity) are :?
1. Ear ossicles Malleus, incus, stapes
2. Muscles →Tensor tympani, stapedius
3. Chorda tympani
4. Tympanic plexus

Correct Answer - D
Ans- Ans. is 'd' i.e., Right recurrent laryngeal nerve [Ref-
BDC 6h/e Vol.l p. 192]
Thoracic inlet (superior aperture)
The narrow upper end of the thorax, which is continuous with
the neck is called the inlet of the thorax'
The structure passing through the inlet are : -l. Vkcera:-
Trachea, esophagus, apex of lung with pleura, remains of the
thymus, thoracic duct.

Correct Answer - C
Ans. C. It is derived from the fourth Pharyngeal pouch
The thymus is a specialized primary lymphoid organ of the immune
system. Within the thymus, T cells or T lymphocytes mature.
The thymus is largest and most active during the neonatal and pre-
adolescent periods. By the early teens, the thymus begins to atrophy
and thymic stroma is mostly replaced by adipose (fat) tissue
Thymus is derived from the third pharyngeal pouch