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Mcqs MBBS Exams India
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(Single Best Answer) Question 721: Consider the following statements:

1. Diets high in Vitamin C have been claimed to lower the incidence of certain cancers, particularly oesophageal and gastric cancers

2. Vitamin C can prevent the conversion of nitrites and secondary amines to carcinogenic nitrosamines

Which of the statements given above is / are correct ?
A) 1 only
B) 2 only
C) Both 1 and 2
D) Neither 1 nor 2
Answer (Select an option above to get the answer):
(Single Best Answer) Question 722: The most common opportunistic infection observed in patients with AIDS is ?
A) Atypical mycobacteria
B) Haemophilus influenzae
C) Pseudomonoas aeruginosa
D) Pneumocystis carinii
Answer (Select an option above to get the answer):
(Single Best Answer) Question 723: Which of the following conditions may produce wrist drop ?
A) Lead poisoning
B) Diabetes mellitus
C) Alcoholics
D) Beriberi
Answer (Select an option above to get the answer):
(Single Best Answer) Question 724: The most common hospital-acquired (nosocomial) infection is ?
A) Urinary tract infection
B) Pneumonia
C) Surgical wound infection
D) Bacteraemia
Answer (Select an option above to get the answer):
(Single Best Answer) Question 725: The pathogenic organism responsible for the causation of Donovaniasis is ?
A) Chlamydia trachomatis
B) Calymmatobacterium granulomatis
C) Haemophihlus ducreyi
D) Herpes simplex virus
Answer (Select an option above to get the answer):
(Single Best Answer) Question 726: The incubation period of mumps is ?
A) 1 - 2 weeks
B) 2 - 3 weeks
C) 3 - 4 weeks
D) 4 - 5 weeks
Answer (Select an option above to get the answer):
(Single Best Answer) Question 727: A 38-year-old man presents with chest pain and shortness of breath. His pulse rate is 85 / min, blood pressure is 180 / 118 mm Hg and the cardiac auscultation reveals an ejection systolic murmur. The ECG shows LVH pattern and ST depression in the anterior leads. His Troponin T test is positive. The echocardiogram of the person is likely to reveal ?
A) Aortic regurgitation
B) Aortic stenosis
C) Mitral regurgitation
D) Mitral valve prolapse
Answer (Select an option above to get the answer):
(Single Best Answer) Question 728: A young woman in the mid-20s with abnormally low body weight reports binge eating and purging 5 - 10 times a week for the last several years. She has intense fear of becoming fat and has a feeling that she is fat despite an objectively low weight. She has also developed amenorrhoea. What is the most appropriate diagnosis ?
A) Anorexia nervosa
B) Bulimia nervosa
C) Endogenous depression
D) Schizophrenia
Answer (Select an option above to get the answer):
(Single Best Answer) Question 729: Consider the following statements:
During an acute attack of asthma:
1. Pulsus paradoxus develops when the FEV1 is less than 25 percent of the predicted value

2. A normal to increased PaCO2 signals a severe airway obstruction and impending respiratory failure

3. The arterial PaCO2 decreases and the arterial pH increases

4. The presensce of cyanosis is a reliable prognostic sign

Which of the statements given above are correct ?
A) 1, 2 and 3
B) 2, 3 and 4
C) 1, 3 and 4
D) 1, 2 and 4
Answer (Select an option above to get the answer):
(Single Best Answer) Question 730: A 30-year-old man presents with fever and progressively increasing breathlessness since the last two weeks. His clinical examination reveals: pulse 120/min regular, BP 100/60 mm Hg, muffled S1 and S2 heart sounds. The distended jugular vein has a rapid X descent, with an absent Y descent. What is the probable diagnosis ?
A) Right ventricular failure
B) Constrictive pericarditis
C) Cardiac tamponade
D) Left ventricular failure
Answer (Select an option above to get the answer):