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

• A
  $A-r, B-s, C-t, D-q$
• B
  $A-s, B-r, C-p, D-q$
• C
  $A-r, B-q, C-t, D-q$
• D
  $A-q, B-p, C-t, D-r$