Numismatics is the study of / न्यूमिसमेटिक्स किसका अध्ययन है Bones/ हड्डियाँ Coins/ सिक्के Manuscripts/ पांडुलिपियों Inscriptions/ शिलालेख

Numismatics is the study of coins, which encompasses the analysis of their history, production, and usage. This field not only focuses on the physical attributes of coins but also delves into the economic and cultural contexts in which they were used. By studying coins, numismatists can gain insight into the historical events, trade practices, and societal norms of different civilizations.

In light of the options provided in your question:

• Bones (हड्डियाँ) refer to the study of anatomy or archaeology.
• Coins (सिक्के) are directly related to numismatics.
• Manuscripts (पांडुलिपियों) pertain to written documents and literature studies.
• Inscriptions (शिलालेख) involve the study of engravings and written records in stone or metal.

Therefore, the correct answer is Coins (सिक्के).