Which ofthe following can be used as an Inverter?

92) BCG vaccine is used against

93) A boat takes thrice as much time to sail in the upstream of a river as it would have taken to sail in the downstream. If the speed of the water is 5 kmph, then the speed of boat in still water is

94) In a right angled triangle, if the square of the hypotenuse is twice the product of the other two sides, then one of the angles of the triangle is

95) Which one is a gas?