Which of the following group elements are called chalcogens?

Correct option is A

The correct answer is (a) Group-16.
 The elements in Group-16 of the periodic table are called chalcogens.
 The term "chalcogen" comes from the Greek words "chalcos" (meaning ore) and "genes" (meaning born or produced), as many ores contain oxygen and sulfur, which are part of this group.
 Group-16 elements include oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po).
 These elements are crucial for various biological and industrial processes.
 Oxygen, the most abundant element in the Earth's crust, is essential for respiration in living organisms and combustion processes.
 Sulfur is used in the production of sulfuric acid, one of the most important industrial chemicals.
 Selenium is used in electronics and glass manufacturing, while tellurium is used in metallurgy and as a semiconductor.
 Polonium is a radioactive element with applications in nuclear science and industry.