Which of the following need not to be done as remedial measures for the sick well?

Which of the following need not to be done as remedial measures for the sick well? Correct Answer Sand production

Sand production need not be done as a remedial measure. Workover Job may need to be done e.g. freeing a stuck pipe, fishing, etc. Pressure maintenance can be done by injection gas. EOR is the enhanced oil recovery technique that may need to be done as tertiary recovery.
Bissoy MCQ

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Assertion (A) When an industrial unit falls sick, those who depend on it have to face an uncertain future.
Reason (R) The sick units continue to operate below the break-even point and are thus forced to depend on external sources for funds of their long-term survival.
Which of the following method can be used as remedial measures for plugged perforation?