As per WHO classification, a newborn with a birth weight of 900 grams belongs to which category?

• A Low birth weight
• B Extremely low birth weight ✓
• C Very low birth weight
• D Ultralow birth weight

Explanation

WHO defines low birth weight as less than 2500 g, very low birth weight as less than 1500 g, and extremely low birth weight as less than 1000 g. A 900 g infant therefore falls into the extremely low birth weight category. There is no recognized ultralow birth weight category in standard classifications, making option D a fabricated distractor.

Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.

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Written and medically reviewed by the StethoPrep medical team.