D
The methods of making copper available through nuclear physics in unlimited quantities for industries may be possible. But it has to be borne in mind that the cost factor is an important consideration in industrial use. Hence the production of copper from other metals in industrial quantities would be prohibitively expensive in energy and materials.
B
A large amount of carbon dioxide is generated by the use of fuels in industry. Therefore it follows that no matter which fuels are used by industry, there is bound to be an increase in the total amount of carbon dioxide in the atmosphere and a consequent unwelcome warming effect on climate is inevitably there. The given statement is a factual statement. If the given statements are considered to be true, then B choice can be the conclusion drawn from the given premises. The other choices A, C, D are relevant because the emphasis is more on the consequence of a warm climate rather than the fact that there is an increase in the total amount of carbon dioxide in air irrespective of whatever kind of fuels that are used.
E
The sequence written side by side on a single line has words which (1) Do not have more than 2 vowels, (2) None of the words begin with 1, P or X, (3) From left to right are in alphabetical order where the initial letters of the words (J K L M N) come immediately after each other in the alphabet. Hence unlike the sequences in A, B, C and D, Jester, Kettle, Label, Mental, Nerves i.e. sequence E is the only one which conforms to all the conditions stated above.
C
Since F is the initial letter of the middle word, then the order of the initial letters of the middle word, then the order of the initial letters of the sequence of words would be D, E, F, G, H - as per the last condition in the statement. Therefore the first and last words would have the initial letters D and H respectively in that sequence.
C
Since 1, P, X cannot be the initial letters of any word in the sequence of words, according to the conditions in the statement, if the sequence of words is to be according to alphabetical order then by the process of elimination only C does not apply.
D
Applying the same logic as above, the first word in a sequence can not begin with the letter K as the last word would begin with P which is not allowed.
A
The rest of the words in B, C, D and E are not acceptable as per the conditions in the above statement.
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