a A soldier b could fight c for his country and save his country rsquo s honour d No error ........

English ( Master) Modals

(a) A soldier/ (b) could fight/ (c) for his country and save his country’s honour. / (d) No error.

Correct answer is (b). Use ‘Must’ or ‘ought to’ in place of could. Because we need obligation according to the sentence for which we will use 'must'.

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