[A] [B] [E] can be eliminated easily as they contain "disease involving...".
Verb -ing modifiers without a comma before it ,modify the immediate noun before it.
[D] "..disease that involves the introduction.." also not correct.
Hence answer [C]
Verb -ing modifiers without a comma before it ,modify the immediate noun before it.
[D] "..disease that involves the introduction.." also not correct.
Hence answer [C]
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