Correct option is B
Option (b) contains the error.
Correct phrase: "piece by logical piece"
Explanation: The phrase "piece by logic piece" is grammatically incorrect as "logic" is a noun, but here we need an
adjective to modify "piece".
✔ The correct usage is
"piece by logical piece".
Grammatical Rule: Adjectives modify nouns. When a noun like "piece" is being described, an adjective like "logical" should be used.
Example: She solved the puzzle step by careful step.
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Information Booster: Nouns must be modified by appropriate adjectives, not by other nouns directly unless forming compound nouns.