Which of the following represents a formation equation for C₆H₅OH(I)?
1) 6C(gr) + 3H2(g) + 1/2O2(g) → C₆H₅OH(l)
2) C₆H₅OH(l) → 6C(gr) + 3H2(g) + 1/2O2(g)
3) 6C(gr) + 3H2(g) + 1/2O2(g) → C₆H₅OH(l) + 6
4) C₆H₅OH(l) + 6 → 6C(gr) + 3H2(g) + 1/2O2(g)