The regions of the atmosphere, where clouds form and where we live, respectively, are :

Ethylamine (C₂H₅NH₂) can be obtained from N-ethylphatalimide on treatment with :

Consider the following table :

Gas	a/(k Pa dm6 mol-1)	b/(dm3 mol-1)
A	642.32	0.05196
B	155.21	0.04136
C	431.91	0.05196
D	155.21	0.4382

a and b are vander Waals constants. The correct statement about the gases is :

Consider the statements S1 and S2

S1 : Conductivity always increases with decrease in the concentration of electrolyte.

S2 : Molar conductivity always increases with decrease in the concentration of electrolyte.

The correct option among the following is :