For the Reaction LiOH (S)⇌ Li⁺ (Aq)+ OH^- (Aq)

For the reaction LiOH (s) ⇌ Li⁺ (aq) + OH^- (aq) , = 4.6 × ,and the equilibrium concentration for hydroxide ion is [OH^-] = 0.042 M.What is [Li⁺] at equilibrium?

A) 0.11 M
B) 0.0046 M
C) 0.042 M
D) An answer cannot be determined without [LiOH] value.
E) none of the above