If Chromium(III)chloride Is Added to Be 1 × 10^-12 M

If chromium(III) chloride is added to be 1 × 10^-12 M in an aqueous solution that is 0.10 M NH₃,what is Q_sp and will Cr(OH) ₃(s) precipitate? The K_sp of Cr(OH) ₃ is 6.3 × 10^-31 and K_b for NH₃ is 1.8 × 10^-5.

A) 1.0 × 10^-16,yes
B) 2.4 × 10^-23,no
C) 2.2 × 10^-19,no
D) 2.2 × 10^-19,yes
E) 2.4 × 10^-21,yes