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Question
Which of these is used to repel moths?
Options:
A .  Naphthalene balls 
B .  Bitumen
C .  Coal gas
D .  Paraffin wax
Answer: Option A
:
A
Naphthalene or mothballis awhite solid with a pungent odour derived from thedistillationofcoal tar. It sublimesinto a pungent toxic smell whichdrives away insects and moths.

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