488.The occurrence of hyperthyroidism following administration of supplemental iodine to subjects with endemic iodine deficiency goitre is known as:

  1.Jod-Basedow effect    
  2.Wolff-Chaikoff effect     
  3.Thyrotoxicosis factitia     
  4.De Quervain's thyroiditis

Ans-1. Jod-Basedow effect  
   
  Reference : - > Harrison-(15)-2077

487.After doing proper etching ,what is the ideal depth of the microtags formed.

a.0.5-5micrometres
b.5-50 micrometres
c.50-500 micrometres
d.500-5000 micrometres


Ans-b.5-50 micrometres

486.When estimating working length using paralleling technique radiograph,how much enlargement of image is allowed

a.1mm
b.2mm
c.3mm
d.None

Ans-b.2mm