DIRECTIONS: Read the following three statements and choose the correct answer. (i) Burning of magnesium ribbon is an endothermic reaction. (ii) Magnesium on burning in air forms ash. (iii) Ash formed on burning of magnesium ribbon is magnesium dioxide.

• A. Statement (i) and (iii) are incorrect but (ii) is correct
• B. Statement (i) and (ii) are incorrect but (iii) is correct
• C. All statements are correct
• D. All statements are incorrect