81.Chloromycetin is a durg for

82.Which of the following components of solar radiation cause sunburn ?

83.A bomb is dropped at a point from a moving aeroplane. The pilot observes that

84.Which of the following seeds grows by epigeal germination ?

85.Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : In very cold regions in the vocinity of the cold surface of a lake or snow field, the image of a shop will appear lifted in mid-air.Reason (R) : Total internal reflection takes place causing the phenomenon of looming.