When national awardees would relinquish their titles, they would do it publicly, hence, 4-a is correct match.

The government relinquishes time limit means it waives the limit, thus, 3-c is the correct match.

The opposition party has relinquished its stand means it has abandoned it i.e. no longer holds to it.

The option that goes with the above matches is Option 4.

A contains no error.

B. 'Scarcely' is followed by 'when' and not 'than' as a grammar rule. Hence, 'than' shall be replaced with 'when'.

C. Delete 'not' coming after 'until', as the word 'until' is never followed by a negative sentence.

'Poor quality or condition' can be used to describe 'the living conditions in the slums'; hence, 2-c is a correct match.

'Very bad' can be used to describe the 'singing' of a person (as it drew a complaint); hence, 3-d is a correct match.

'Detestable' can be used for both decisions as well as crimes. However, 'curse' can only be used for a crime and not a decision.

Hence, 1-a and 4-b are correct matches.

A. 'Though' and 'yet' are conjunctions, which are used in pair. Replace 'still' with 'yet'.

B. This has no error.

C. Relative pronoun 'who' is used to refer to human beings and 'which' is used to refer to non-living things. 'Craftsman' refers to a human being; so 'who' should be used.

Demure means shy or reserved and hence the answer should be modest i.e. synonym.

A. Delete 'that'. Relative pronoun 'that' is not used with interrogative words like 'how', 'why', etc.

B. 'Is' shall be replaced with 'are'. With conjunctions 'neither-nor' present in the sentence, the verb shall be used according to the second subject. The subject 'colleagues' is plural, so the plural verb should be used.

C. 'To write' shall be replaced with 'writing'. With the word 'stop', we use the verb in the gerund form.

A. The comparative form 'less' is not required in this case. It shall be replaced with 'little'. 'Little' means 'next to none'.

B requires no change.

C. 'Keep one's word' is the correct idiom. It means to honour one's promises. It is never used in the plural form.

For meaning 1:

Agreement is implied in usage 'b', as government agreed to the demands of the terrorists.

Hence, 1-b is the correct match.

For meaning 2:

Office or position is very similar to taking charge of say throne as in usage 'a'.

Hence, 2-a is the correct match.

So, the correct option is 2.

'Lacking originality' can be used only for a movie plot from amongst the options.

Hence, possible options are 1 and 3.

'Petroleum is a derivative of coal tar (a substance)' goes with meaning '4'.

Debauchery means depravity.