Concept:
India’s export structure has evolved over time, shifting from primary products to value-added manufactured goods.
Step 1: {\color{red}Understand export categories.}
Agriculture and allied products → Important but smaller share.
Ores and minerals → Limited contribution.
Manufactured goods → Includes machinery, textiles, automobiles, and chemicals.
Mineral fuels → India is mostly an importer.
Step 2: {\color{red}Identify dominant category.
Manufactured goods form the largest share of India’s exports due to industrial growth and global demand.
Conclusion:
\[
\boxed{(C)\ \text{Manufactured goods}}
\]