Multiple choice questions XXXXIII — task. Science CBSE, Class 9.

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1. Which of the following bacteria causes peptic ulcer?

Helicobactor pylori
Pesudomonas maltophilia
Staphylococcus aureus
Streptococcus pyrogens

2. Viruses that cause hepatitis are transmitted through ___________.

food
air
water
personal contact

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