676: A, B, C, D, E and F, not necessarily in that order, are sitting on six chairs regularly placed around a round table. It is observed that A is between D and F, C is opposite D, D and E are not on neighbouring chairs. The person sitting opposite B is:
(a) A
(b) D
(c) E
(d) F
677: A man is waiting for a bus on routes 10, 17 and 25. The bus on route 10 comes every 10 min, bus on route 17 comes every 20 min, and bus on route 25 comes every 40 min. After the man reaches the stop, a bus just leaves the stop. What is the minimum time for which he has to wait to get a bus?
(a) 2 min
(b) 4 min
(c) 6 min
(d) 10 min
678: The drugs "caffeine, tannin and nicotine" are:
(a) Steroids
(b) Cortisones
(c) Alkaloids
(d) Mild alkalis
679: Which of the following republics, besides Russia, are nuclear powers?
1. Ukraine
2. Georgia
3. Belarus
4. Kazakhstan
(a) 1, 2 and 4
(b) 2, 3 and 4
(c) 1, 2 and 3
(d) 1, 3 and 4
680: National Income is the
(a) Net National Product at market price
(b) Net National Product at factor cost
(c) Net Domestic Product at market price
(d) Net Domestic Product at factor cost