Directions: Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No improvement’. Lenovo has launched ThinkPad XI Fold, the world’s first foldable laptop which is claimed to be so durable as its other devices.

Explanation

The correct answer is "to be as durable as" . Key Points In the given underlined segment, the use of "so durable as" is incorrect as " so...as " can only be used with negative like 'not'. We use not + so + adjective/adverb + as to make comparisons, meaning not to the same degree . In the first option, ' most ' is used which is not a comparative adjective but a superlative adjective . In the third option, ' very ' is not generally comparable. We can use ' very 'before superlative adjectives that end in -est. But we use as + adjective/adverb + as to make comparisons when the things we are comparing are equal in some way . Hence , the correct answer is option 4 . Correct Sentence : Lenovo has launched ThinkPad XI Fold, the world’s first foldable laptop which is claimed to be as durable as its other devices. Additional Information We can use " as...as " for both negative and positive , " so...as " can only be used with negative .