কোনটি প্রোপেনের দহন নির্দেশ করে?

$\mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g})=3 \mathrm{C}(\mathrm{s})+3 \mathrm{H}_{2}(\mathrm{~g})$

$\mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g})=\mathrm{C}_{3} \mathrm{H}_{6}(\mathrm{~g})+\mathrm{H}_{2}(\mathrm{~g})$

$\mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g})+\frac{7}{2} \mathrm{O}_{2}(\mathrm{~g})=3 \mathrm{CO}(\mathrm{g})+4 \mathrm{H}_{2} \mathrm{O}(l)$

$\mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g})+5 \mathrm{O}_{2}(\mathrm{~g})=3 \mathrm{CO}_{2}(\mathrm{~g})+4 \mathrm{H}_{2} \mathrm{O}(l)$