Soil contains decayed remains of living organisms. This is called 

There are three main groups of oils-animal, vegetable and mineral. Great quantities of animal oil come from whales, creatures of the sea, which are the largest of the animals remaining in the world. To protect the whales from the cold of the Artic seas, nature has provided them with a thick covering of fat, called blubber. When the whale is killed, the blubber is stripped off and boiled down. It produces a great quantity of oil which can be made into food for human consumption. A few other creatures yield oil, but none so much as the whale. The livers of the cod and halibut, two kinds of fish, yield nourishing oil. Both cod liver oil and halibut oil are given to sick children and other invalids who need certain vitamins. 
Vegetable oil has been known from very old times. No household can get on without it, for it is used in cooking. Perfumes may be made from the oils of certain flowers. Soaps are made from eatable and animal products and the oils of certain flowers. 

The main source of animal oil, is –

A train travelling at the speed of 50 kmph leaves from a station. Another train travelling at speed of 60 kmph leaves the same station after 7 hours in the same direction. They will meet after what distance?

Direction: In the following question, out of the four alternatives, choose the one which can be substituted for the given sentence.

Direction : Study the following information carefully and answer the given questions.
 A, B, C, D, E, F, G and H are sitting around a circular area at equal distance between each other, but not necessarily in the same order. Some people face the centre while some face outward (i.e. in a direction opposite the centre.) B sits third to the right of E. E faces outward. Only one person sits between B and F. Both the immediate neighbours of F face outward. Only three persons sit between G and H. G is not an immediate neighbour of B. Both the immediate neighbours of D face the centre. D is not an immediate neighbour of G. Both the immediate neighbours of C face the centre. Both the immediate neighbours of E face a direction opposite that of G (i.e. if G faces the centre, then both the immediate neighbours of E face outward and vice versa).

Who among the following are immediate neighbours of F?