The correct option is Ludhiana.
Explanation
The woollen textile industry in India is predominantly concentrated in the northern states. This distribution is influenced by the availability of raw materials (wool from sheep-rearing regions in the Himalayas and semi-arid Rajasthan) and the local market demand driven by colder climatic conditions.
City-wise Analysis:
- Ludhiana (Punjab): This city is the largest centre for woollen textiles in India. It is particularly renowned for its hosiery industry. Ludhiana produces a significant majority (often estimated at over 80-90%) of India's woollen hosiery goods. The concentration of units here is due to early industrial inertia, availability of skilled labour, and proximity to raw material markets.
- Kanpur (Uttar Pradesh): Historically known as the "Manchester of the East," Kanpur is a major centre for the leather and cotton textile industries, not woollen textiles.
- Srinagar (Jammu & Kashmir): While Srinagar is world-famous for high-value, traditional woollen products such as Pashmina shawls and hand-knitted carpets, its production is largely cottage-based and does not match the industrial-scale volume of Ludhiana.
- Jaipur (Rajasthan): Jaipur is a significant centre for cotton printing, rugs, and carpets, but it is not the largest producer of general woollen apparel or textiles compared to Ludhiana.
Key Takeaway: Ludhiana is the undisputed hub of the Indian woollen textile industry, specifically dominating the production of woollen hosiery and apparel.