Who proposed the Pulsation Theory for the ascent of sap?

An osmoscope is used for:

What does Darwin's potometer determine?

Unequal loss of water from two surfaces of a dorsi-ventral leaf can be determined by

$A$ potometer works on the principle of:

Match the theories given in column-$I$ with the names of scientists listed in column-$II$. Choose the answer which gives the correct combination of the alphabets.

Column-$I$ (Names of theories)	Column-$II$ (Names of scientists)
$(A)$ Relay pump theory	$(p)$ Stocking
$(B)$ Transpiration cohesion theory	$(q)$ Sir $J$.$C$. Bose
$(C)$ Mass flow	$(r)$ Godlewski
$(D)$ Pulsation theory	$(s)$ Dixon and Joly
	$(t)$ Ernst Munch