Nitric acid, HNO₃, can be manufactured from ammonia, NH₃, by using the three reactions shown below.

Step 1: 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(l)

Step 2: 2 NO(g) + O₂(g) → 2 NO₂(g)

Step 3: 3 NO₂(g) + H₂O(l) → 2 HNO₃(aq) + NO(g)

What is the maximum number of moles of HNO₃ that can be obtained from 4.00 moles of NH₃? (Assume that the NO produced in step 3 is not recycled back into step 2.) 

(a) 1.33 mol; 

(b) 2.00 mol;

(c) 2.67 mol; 

(d) 4.00 mol; 

(e) 6.00 mol.