Gas used to measure diffusion capacity of lung is?
A. CO
B. NO
C. CO2
D. Nitrogen
Correct answer : CO
Diffusion capacity of lung is the ability to exchange gases between the alveoli and pulmonary blood. It is directly proportional to the surface area of the respiratory membrane and inversely proportional to the thickness. It is decreased in diseases which decrease the surface area (emphysema) and in those which increase the thickness (fibrosis).

Which of the following attains adult size before birth?
A. Ear ossicles
B. Maxilla
C. Mastoid process
D. Parietal bone
Correct answer : Ear ossicles
Tympanic cavity, mastoid antrum, ear ossicles and internal ear are almost fully developed at birth.

Mass chemoprophylaxis is not given for?
A. Lymphatic filariasis
B. Plague
C. Vitamin A Deficiency
D. Scabies
Correct answer : Scabies
Mass chemoprophylaxis is not given for scabies. The close contacts / family members are treated.

Which of the following is not permeable through the blood brain barrier?
A. Water
B. Lipophilic drugs
C. Gas
D. Proteins
Correct answer : Proteins
Blood brain barrier is freely permeable to water, gases like oxygen and carbondioxide and lipid soluble substances. It is slightly permeable to ions like sodium, potassium and chloride. It is impermeable to plasma proteins, and large organic molecules that are not lipid soluble.

Methotrexate is used in all except:
A. Sickle cell anemia
B. Psoriasis
C. Rheumatoid arthritis
D. Ankylosing spondylitis
Correct answer : A. Sickle cell anemia

The results of AIIMS PG entrance November 2011 have been published
We have obtained a copy of the rank list which you can download below
It is also available for download at It has http://www.aiimsexams.org
Please note that we are not responsible for the accuracy of the list given below – you are requested to confirm your rank by looking at the official list

Note: If you or any of your friends have secured a top 50 rank in AIIMS November 2011, we would like to conduct an interview. Please contact us at pgblazerofficial …

Among the following, all are hydrophilic hormones that act on cytosolic receptors except one which is a lipophilic hormone that acts on nuclear receptor?
A. Thyroxine
B. Epinephrine
C. Growth hormone
D. ACTH
Correct answer : Thyroxine
Thyroxine binds to nuclear receptors.

Carpal tunnel syndrome is caused by all except?
A. Amyloidosis
B. Hypothyroidism
C. Addison’s disease
D. Diabetes mellitus
Correct answer : C. Addison’s disease
Explanation: Causes of Carpal tunnel syndrome – Mnemonic

Entrance examination for admission to All India Institute of Medical Sciences (AIIMS) Post Graduate courses – January 2012 session was conducted on 13th November 2011. We have collected all the 200 questions asked in the exam and published them in our website. You can  visit our AIIMS November 2011 MCQ section to view them! You can also join our  AIIMS PG Entrance – November 2011 – Discussion group to discuss the questions. We are now making required updates to the questions based on the feedback received. We are also trying to find the answers to …

A patient had a history of trauma to the eye 2 months back. Now he presents with ocular damage and multiple cranial nerves involvement. Which of the following is the investigation of choice?
A. MRI 
B. CT 
C. DSA 
D. MRA
Please contribute to the discussion by posting the answer with references and pointing out the errors in the question!