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Earlier discussion
2 older comments kept for context.
Solomon Iweajunwa
Hygroscopic substances absorb water when exposed to the atmosphere, but they don't turn into solution. Instead, they become stick if they were solds, e.g. silica gel; and they become dilute if they were solutions, e.g. concentrated H2SO4
Udoyo Ernest
There's no correct answer. Hygriscopic substance are those substances which absorb moisture on exposure to the atmosphere but do not form a solution with it. e.g conc.H2SO4, CaO, CuO etc.