Since, the starting statement carries a subject; R will be the first statement as it talked about sense of inferiority. S follows next logically. P describes the feeling of inferiority and thus continues with the flow. Q will be the concluding statement and thus form a coherent paragraph.

The correct formation would be, ‘The sense of inferiority in others and not an exalting one is a painful feeling without this indirect appeal of our self-love.’

Since, the starting statement carries a subject; R will be the first statement. The next statement describes why are they hunted, so Q follows P, as it states that what is being done with the horns. S would be the concluding statement and thus form a coherent paragraph.

The correct formation would be, ‘The Rhinoceros is hunted by poachers for its horn which is sold at high prices.’

Since, the starting statement carries a subject; the next statement will carry a verb i.e. Q follows as it mentioned the discovery of the Regent. R will bethe continuing statement which states what he actually discovered. P follows next as it talked about the reaction of the Regent after the discovery. And S would be the concluding statement and thus form a coherent paragraph.

The correct formation would be, ‘The Regent having discovered that he had imprisoned an innocent man released Voltaire and gave him a pension.’

Since, the sentence starts talking about the reason; R will be the continuing statement as it goes with the flow of the statement. The continuing statement talks about the existing of life i.e. P. Thus, all other options are eliminated. The correct formation would be, ‘There is no reason why we should not be willing to think that life may exist in great profusion in other worlds.’

Since, the sentence starts talking about the ultimate hope; it should be followed by the statement that is talking about the hope. So, only statement Q connects with the given statement. Also, in the options there is a single option with starting statement as Q. The correct formation would be, ‘The ultimate hope that the destructive nature of weapons will force the nations to give up war has not been fulfilled.’

The phrase ‘that he could not serve’ is grammatically correct. This is because other forms of verb doesn’t go with the blank and this form of verb is grammatically and contextually correct. Thus, the correct formation would be, ‘He was too conscientious in the discharge of his duties to serve that exploiter for long’.