Match statements in List I with correct answer in List II.
1) A compound formed when a metal burns in oxygen is MgO.2) The pollutant mainly responsible for the greenhouse effect is CO2.
3) The component of a candle contains mixture of carbon and hydrogen.
4) The component of air which rekindles a glowing splint is O2.
5) The carbon compound formed during photosynthesis is C6H12O6.