Seema takes four test tubes and labels them as (A), (B), (C), (D). She puts an iron nail in each of the test tube and puts the following :
(A) -oil
(B) -soda lime
(C) -hot water
(D) -tap water
She closes all the test tubes and writes observations after few days.
Which of the following observations is correct ?
1
In test tube (A) and (C), the iron nail is rusted whereas in (B) and (D), it is not rusted
2
In test tubes (A) and (B), the iron nail is rusted whereas in (C) and (D), it is not rusted
3
In test tube (D), the iron nail is rusted whereas in (A), (B) and (C) it is not rusted
4
In test tube (C), the iron nail is rusted whereas in (A), (B) and (D) it is not rusted