Here's a problem to solve: Which equation is correctly balanced for hydrogen and oxygen reacting to form water?

Among the 4 following options, which is the correct answer?

- A: H_{2} + O_{2} -> H_{2}O
 
- B: 2H_{2} + O_{2} -> 2H_{2}O
 
- C: 4H + O_{2} -> 2H_{2}O
 
- D: H_{2} + O -> H_{2}O
 