Yugoslavian dinars cannot be exchanged for Indian rupees—or any current currency. The country of Yugoslavia dissolved in the 1990s, and its successor states (Serbia, Montenegro, Croatia, Slovenia, North Macedonia, Bosnia & Herzegovina, Kosovo) each introduced new currencies.
All Yugoslav-era banknotes and coins are demonetized. Central banks of successor states had finite exchange windows (most expired 2000s–2010s). The National Bank of Serbia exchanged YUM until 2010; no institution currently honors Yugoslav issues.
Some Yugoslav notes/coins have numismatic value (e.g., 1993–1994 hyperinflation issues: 500 billion dinar note). Consult coin dealers or auction houses (e.g., Numista, eBay) for collectible assessment—but these are not financial instruments.
For any remaining Yugoslav currency, the only value is historical/collectible.