Heat of reaction and heat of formation will be the same in 

I. $$\frac{1}{2}\text{N}_2(g) + \text{O}_2(g) \rightarrow \text{NO}_2(g)$$, 

II. $$\text{Xe}(g) + 2\text{F}_2(g) \rightarrow \text{XeF}_4(g)$$, 

III. $$\text{N}_2(g) + \text{O}_3(g) \rightarrow \text{N}_2\text{O}_3(g)$$, 

IV. $$\text{C (diamond)} + \text{O}_2(g) \rightarrow \text{CO}_2(g)$$

A

Only I

B

Only I and II

C

Only I, II and III

D

Only II, III and IV