B⇢⇢A, is wrong (a1,b1,c1) and (a2,b1,c1) prove this //For same B value different A value
BC⇢⇢A is wrong (a1,b1,c1)and(a2,b1,c1) prove this ////For same B,C values different A value
B⇢⇢AC is wrong (a1,b1,c1)and(a2,b1,c1) prove this //For same B value different A, C values
A⇢⇢B is right answer