One should/ not be hasty/ and impulsive/ in his decisions/ No errorAone shouldBnot be hastyCand impulsiveDin his decisionsENo Error

Break Down the Problem

1. Identify parts of the sentence that might be grammatically incorrect.
2. Check for parallelism in the sentence structure.
3. Analyze the placement and use of conjunctions.

Relevant Concepts

• Parallel Structure: In lists or connections, similar elements should be in the same form.
• Conjunction Use: Ensure correct use of conjunctions for maintaining parallelism.

Analysis and Detail

1. The phrase "not be hasty and impulsive" suggests two adjectives describing the same noun.
2. The use of "and" suggests both adjectives should be in the same form.
3. The sentence can be analyzed as:
   • Subject: "One"
   • Verb: "should not be"
   • Adjectives: "hasty" and "impulsive"
   • Object: "in his decisions"

Verify and Summarize

The structure of the sentence is correct in terms of grammar. The conjunction "and" appropriately connects "hasty" and "impulsive." Therefore, there's no error in the original sentence.

Final Answer

No Error. The sentence "One should not be hasty and impulsive in his decisions" is grammatically correct.