When strips of chloride papers are placed on either side of a dorsiventral leaf, why the strips on the lower side become speedily pink. Because

Options

A. More `CO_(2)` is evolved from the lower side
B. More `O_(2)` is evolved from the lower side
C. More `H_(2)O` is lost from the lower side
D. All the above

Answer

C

Explanation

Cobalt chloride paper is used to test for the presence of water leaking through tiny cracks in pipes. When water is present the test paper goes from blue to pink.