The correct answer is (d). None of the above.
Sodium chloride (table salt) is a mineral compound with the chemical formula NaCl. It is a white, crystalline solid that is highly soluble in water. Sodium chloride is the main mineral constituent of seawater, and is also found in salt lakes and in some mineral deposits. It is used for a variety of purposes, including food flavoring, food preservation, and water treatment.
Calcium carbide is a chemical compound with the formula CaC2. It is a white, crystalline solid that is used in the production of acetylene gas. Calcium carbide is also used as a fertilizer, as a rodenticide, and as a fire starter.
Potassium chloride is a chemical compound with the formula KCl. It is a white, crystalline solid that is highly soluble in water. Potassium chloride is the main mineral constituent of potash, and is also found in some mineral deposits. It is used for a variety of purposes, including fertilizer, food additive, and electrolyte replacement.
None of these chemicals are used for ripening. Ripening is a natural process that occurs in fruits and vegetables as they age. It is caused by the breakdown of starches into sugars, and the production of ethylene gas. Ethylene is a plant hormone that triggers the ripening process.