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Two test tubes. 'A' and 'B' contains iro...

Two test tubes. 'A' and 'B' contains iron nails. In 'A' test tube iron nail is half dipped with water and in 'B' test tube iron nail is completely dipped in water and some oil also added. Then

A

Both nails in A and B undergo rusting

B

Nail in Both A and B do not undergo rusting

C

Nail in 'A' rusts but not in 'B'

D

Nail in 'B' ruts but not in 'A'

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