one-word substitute for the given group of words. The study of coins

Explanation:

Numismatics is the study or collection of coins, currency, medals, and related objects.

Hindi: Numismatics (न्यूमिस्मैटिक्स) = सिक्कों, मुद्राओं और पदकों का अध्ययन।

Meaning of the options:

• ❌ Choreography – The art of designing dance movements. (नृत्य-रचना की कला)
• ✅ Numismatics – The study of coins and currency. (सिक्कों एवं मुद्राओं का अध्ययन)
• ❌ Cartography – The science of making maps. (मानचित्र बनाने का विज्ञान)
• ❌ Informatics – The study of information systems and computer science. (सूचना विज्ञान)

Correct Answer: ✅ Numismatics