1] Psoriasis is characterized by all the following features except :

1. Erythematous plaques

2. Silvery scales

3. Poor demarcated border

4. Koebner's phenomenon

Ans : C

2] Skin lesions commonly seen in tuberous sclerosis include all the following except :

1. Hypo pigmented spots

2. Adenoma sebaceum

3. Shagreen patch

4. Achathosis nigricans

Ans : D

3] All the following statements regarding acne vulgaris are true except :

1. Is caused by fungal infection

2. Is due to sebum retention in hair follicles

3. Is most commonly seen in pregnant women

4. Can be treated with topical antibiotics

Ans : A

4] A 25 year old man complains of having a single vesicular eruption on the shaft of his penis . Recurrence of this lesion 2 months later may be explained by :

1. Deficiency of cell mediated immunity in the patient .

2. A prolonged period of viremia followed by the initial infection

3. A second infection with a similar virus of different serotype

4. Reactivation of latent infection

Ans: D

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