The correct option is B LiCl
In alkali series going down the group the size of the ion increases and electropositive character increases which make it more ionic in nature. According to Fajan's rule, due to small size of lithium, it has high polarising power which makes LiCl more covalent character. Hence, due to more covalent nature among all LiCl is more soluble in non-polar solvents than ionic compounds.