Choose the most appropriate adjective.
Of all the workers in the shop, Jerzy is surely ______________

the least competent

The correct answer is Option (2) → the least competent

The correct adjective to use in the blank is the least competent.

So the complete sentence would be: "Of all the workers in the shop, Jerzy is surely the least competent."

• "the less competent" is incorrect because "less" is used for comparisons between two items, while "least" is used for three or more.
• "the competentest" is not a standard form of the adjective "competent."