176: Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?
(a) Microscope
(b) Lead plate
(c) Scintillation counter
(d) Spectrophotometer
177: A, B, C, D, E and F, not necessarily in that order, are sitting in six chairs regularly placed around a round table. It is observed that
1. A is between D and F.
2. C is opposite D.
3. D and E are not on neighbouring chairs.
Which one of the following must be true?
(a) A is opposite B
(b) D is opposite E
(c) C and B are neighbours
(d) B and E are neighbours
178: Which Article of the Constitution provides that it shall be the endeavour of every State to provide adequate facility for instruction in the mother tongue at the primary stage of eduction ?
(a) Article 349
(b) Article 350
(c) Article 350-A
(d) Article 351
179: Other than resistance to pests, what are the prospects for which genetically engineered plants have been created?
1. To enable them to withstand drought
2. To increase the nutritive value of the produce
3. To enable them to grow and do photosynthesis in spaceships and space stations
4. To increase their shelf life
Select the correct answer using the codes given below :
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4
180: The Prime Minister of India, at the time of his/her appointment
(a) need not necessarily be a member of one of the Houses of the Parliament but must become a member of one of the" Houses within six months
(b) need not necessarily be a member of one of the Houses of the Parliament but must become a member of the Lok Sabha within six months
(c) must be a member of one of the Houses of the Parliament
(d) must be a member of the Lok Sabha