4381: The rich source of iron is:
(a) Eggs
(b) Green vegetables
(c) Pulses
(d) Milk
4382: Dehydration in the human body results due to loss of:
(a) Salts
(b) Water
(c) Vitamins
(d) Hormones
4383: A "closed economy" is an economy in which
(a) Only exports take place
(b) Neither exports nor imports take place
(c) Deficit financing takes place
(d) The money supply is fully controlled
4384: With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements :
1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is / are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
4385: In the context of any country, which one of the following would be considered as part of its social capital?
(a) The proportion of literates in the population
(b) The stock of its buildings, other infrastructure and machines
(c) The size of population in the working age group
(d) The level of mutual trust and harmony in the society