chemical reaction is the final part of the sentence

Answer:
b) 3A + 2B → C
Explanation:
In given ratios of substances there are three mole of reactant A two moles of reactant B and one mole of product C are present.
A : B 3 : 2 A : C 3 : 1 B : C 2 : 1
So from given information option b is correct.
3A + 2B → C
Here in this equation three moles of A , two moles of B and one mole of C are present.
Other options are incorrect because,
a) 6A + 6B → 2C
In this chemical equation six moles of A six moles of B and two mole of C are present. So it is incorrect.
c) A + 2B → 3C
In this chemical equation one mole of A two mole of B and three moles of C are present. So it is incorrect.
d) A + B → C
In this chemical equation one mole of A one mole of B and one mole of C are present. So it is incorrect.