The preferred writing style for answer writing in the UPSC exam is concise, structured, and formal. Candidates should use clear, straightforward language while avoiding unnecessary jargon. Utilizing a systematic approach, such as the introduction-body-conclusion format, can enhance clarity. Presenting arguments logically with relevant examples and evidence strengthens responses. Clarity in expression, proper grammar, and adherence to word limits are crucial for effective communication. This writing style ensures that the answers are both impactful and easily comprehensible to evaluators.