human
Question: Which of these does not illustrate substances reacting to form new substances?

Choices:
A) H_{2}O(l) -> H_{2}O(g)
B) 2H_{2} + O_{2} -> 2H_{2}O
C) 2Na + Cl_{2} -> 2NaCl
D) 6CO_{2} + 6H_{2}O -> C_{6}H_{12}O_{6} + 6O_{2}
gpt
The correct answer is 0: H_{2}O(l) -> H_{2}O(g).