636: In typhoid which of the following drugs is administered?
(a) Chloromycetin
(b) Penicillin
(c) Sulphonamide
(d) Tetracycline
637: Consider the following statements:
1. National Thermal Power Corporation has diversified into hydropower sector.
2. Power Grid Corporation of India has diversified into telecom sector.
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
638: Which one of the following subjects is under the Union List in the Seventh Schedule of the Constitution of Indian ?
(a) Regulation of labour and safety in mines and oilfields.
(b) Agriculture
(c) Fisheries
(d) Public health
639: Which one of the following is caused by the expression of a recessive gene present on sex chromosome ?
(a) Rheumatism
(b) Nervous shock
(c) Muscular dystrophy
(d) Cerebral hemorrhage
640: Assertion (A) :
60° - 65° latitudes in both the hemispheres have a low pressure belt instead of high pressure.
Reason (R) :
The low pressure areas are permanent over oceans rather than on land.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true