The scientist who proposed that the production of glycolic acid in guard cells is an important factor in stomatal opening is:

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. Emphysema	$I$. Rapid spasms in muscle due to low $Ca^{++}$ in body fluid
$B$. Angina Pectoris	$II$. Damaged alveolar walls and decreased respiratory surface
$C$. Glomerulonephritis	$III$. Acute chest pain when not enough oxygen is reaching to heart muscle
$D$. Tetany	$IV$. Inflammation of glomeruli of kidney

Choose the correct answer from the options given below:

Which of the following plants possesses sunken stomata?

Statement-$I$: All the factors in our body are favourable for the diffusion of $O_2$ from alveoli to tissues and that of $CO_2$ from tissues to alveoli.
Statement-$II$: $A$ sigmoid curve is obtained when the percentage saturation of haemoglobin with $O_2$ is plotted against the $pO_2$.

Which one of the following statements is incorrect?

People who have migrated from the plains to an area near Rohtang Pass six months ago will exhibit which of the following characteristics?