You remove four fresh tobacco leaves of similar size and age. Leave "leaf 1" as it is, smear "leaf 2" with vaseline on the upper surface, "leaf 3" on the lower surface and "leaf 4" on both the surfaces. Hang the leaves for a few hours and you observe that leaf 1 wilts the most, 2 has wilted, leaf 3 wilted less than leaf 2 and leaf 4 remains fresh. Which of the following conclusion is most logical?
A. tobacco leaf has more stomata on the upper surface
B. tobacco leaf has more stomata on the lower surface
C. stomata are equally distributed in upper and lower surfaces
D. no conclusion on stomatal distribution can be drawn from this experiment
