4. Virus are :
(a) Man made
c Machine made
(b)
(d)
Naturally occur
All the above
(c)
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4. Virus are :
(a) Man made
c Machine made
(b)
(d)
Naturally occur
All the above
(c)
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Answer:
all of these
Explanation:
please make me brain list
Answer:
naturally occurring hope it's helpful