The molar conductivity for electrolytes A and B are plotted against $$C^{1/2}$$ as shown below. Electrolytes A and B respectively are 

A

A: strong electrolyte ; B: weak electrolyte

B

A: weak electrolyte ; B: weak electrolyte

C

A: weak electrolyte ; B: strong electrolyte

D

A: strong electrolyte ; B: strong electrolyte