Grapes immersed in water would shrink if

If the osmotic pressure of the cytoplasm in a cell is balanced by an external solution,the solution must be

What is correct for osmosis?

Water will be absorbed by root hairs when:

All of the following involve osmosis,except:

An onion peel was taken and
$(a)$ placed in salt solution for five minutes.
$(b)$ after that it was placed in distilled water.
When seen under the microscope,what would be observed in $(a)$ and $(b)$?