Hello friends,
This is General Knowledge Quiz Contest - 115.
Test your General Knowledge participating by giving answer in comment.
Question:
What can blue john be used for?
Options:
A
Coating steel, particularly gun barrels, to protect from rust
B
Whitening clothes being washed
C
Storing Johnnie Walker blue label whisky
D
Jewellery, drinking vessels, vases
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Play fair, do not search answer on google. :)
