51.Which of the following statements are true regarding petroleum? I. Nearly 60 per cent of the world�s petroleum reserves are found in the Middle East II. Alaska has proved petroleum resources comparable to Texas III. The U.S.A. is both a major producer and a major importer of petroleum Select the correct answer from the codes given below: Codes:

52.According to the ancient Indian geographical concept `Bharata Varhsa� was a part of:

53.Which of the following statements are true about Punjab? Select the correct answer from the codes given below the statements: I. It is the richest State in India II. It has the highest proportion of S.C. in its total population III. It has reached the replacement level of population Codes:

54.In Mizoram the settlement pattern is mostly of `linear type along the ridges because:

55.Which one of the following shows the descending order of the four metropolitan cities in the Indian sub-continent, so far as their population strength is concerned?