Match the column A  with Column B .

The correct answer is: (i) – (c), (ii) – (d), (iii) – (a), (iv) – (b)

The correct option is b)(i) – (c), (ii) – (d), (iii) – (a), (iv) – (b).
i)Calcium carbide came to be used instead of kerosene. First, all but the last node are removed. Next, make a small hole in the bamboo stick. Put calcium carbide in the hole and add water until white smoke comes out of the bamboo tube. Light the smoke with a match and make it explode.
ii)Calcium carbonate is used as a dietary supplement  when the amount of calcium in the diet is inadequate. Calcium is needed by the body for healthy bones, muscles, nervous system and heart. Calcium carbonate is also used as an antacid to relieve heartburn, acid indigestion, and upset stomach.
iii)Sodium bicarbonate, also known as baking soda, is used to relieve heartburn, sour stomach, or acidic indigestion by neutralizing excess stomach acid. It belongs to a group of drugs called antacids.
iv)Silicon carbide is a ceramic material with excellent hardness surpassed only by diamond, cubic boron nitride and boron carbide. Due to its high wear resistance and relatively low cost, silicon carbide is often used as a loose or solid abrasive materials.