Elemental Boron Can Be Formed by Reaction of Boron Trichloride

Elemental boron can be formed by reaction of boron trichloride with hydrogen. BCl₃(g) + 1.5H₂(g) → B(s) + 3HCl(g)
Calculate ΔG° for the reaction.
Substance: BCl₃(g) H₂(g) B(s) HCl(g)
ΔG°_f (kJ/mol) : -388.7 0 0 -95.3

A) -293.4 kJ
B) 293.4 kJ
C) -102.8 kJ
D) 102.8 kJ
E) None of these choices are correct.