state gov PSSSB Clerk Mock Test 2023 Biology Health and Disease Diseases

ਹੈਪੇਟਾਈਟਸ-ਬੀ ਇਹਨਾਂ ਰਾਹੀਂ ਫੈਲਦਾ ਹੈ:

1
ਛਿੱਕ
2
ਔਰਤ ਐਨੋਫਿਲਜ਼
3
ਖੰਘ
4
ਖੂਨ ਚੜ੍ਹਾਉਣਾ
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