Observe the given experimental set-up carefully.
In which test tubes rusting of iron nails will not take place?
A P and Q only
B Q and R only
C P and R only
D All of these
Observe the given experimental set-up carefully.
In which test tubes rusting of iron nails will not take place?
A P and Q only
B Q and R only
C P and R only
D All of these