The correct option is A Magnesium + Oxygen → Magnesium oxide + Heat + Light
An essential condition for combustion is the presence of oxygen.
Magnesium burns in air in the presence of oxygen to produce magnesium oxide. During the process of combustion, heat and light are given out. Hence, the reaction of burning of magnesium can be represented as:
Magnesium + Oxygen → Magnesium oxide + Heat + Light