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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The earliest clinical sign of vitamin A deficiency is -
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The correct answer is  Conjuctival xerosis is the early manifestation of vitamin A deficiency. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 568