Megha conducted an experiment with plants and prepared three set-ups as shown in the figure.
(A) Set-up P, because layer of oil increases evaporation.
(B) Set-up R, because it will lose water by both transpiration and evaporation.
(C) Set-up Q, because it will lose water by both transpiration and evaporation.
(D) Set-ups R and Q will show same level of decrease
because both of them lose water by transpiration.
what is the answer and why??