2551: A person X has four notes of Rupee 1, 2, 5 and 10 denomination. The number of different sums of money she can form from them is
(A) 15
(B) 16
(C) 12
(D) 8
2552: The main reason for unrest and violence in Zimbabwe in recent years is due to
(a) conflict between different native ethnic groups
(b) prolonged crisis over land reforms
(c) economic crisis due to continuous drought and famine
(d) power struggle between political groups of white European settlers and native black community
2553: Identical twins are born when:
(a) Two sperms fertilise one ovum
(b) Two sperms fertilise two ovums simultaneously
(c) One sperm fertilises the ovum and zygote divides into two separate cells developing independently
(d) One sperm fertilises two ovums
2554: In high mountain regions bleeding through nose occurs because:
(a) The pressure of the blood capillaries is higher than the outside pressure
(b) The pressure at high altitudes is greater than that in the plains
(c) The blood pressure increases at high altitudes
(d) The blood pressure decreases at high altitudes
2555: India is an important member of the 'International Thermonuclear Experimental Reactor'. If this experiment succeeds, what is the immediate advantage for India?
(a) It can use thorium in place of uranium for power generation
(b) It can attain a global role in satellite navigation
(c) It can drastically improve the efficiency of its fission reactors in power generation
(d) It can build fusion reactors for power generation