state gov UP NHM CHO 2025 Mock Test Nursing Community Health Nursing

हेपेटाइटिस B _______ के कारण होता है।

1
मल सन्दूषण
2
जल सन्दूषण
3
आन्त्रेतर मार्ग
4
भोजन सन्दूषण
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