Before the railway age, Mirzapur, a city in the Indian state of Uttar Pradesh, was a significant collection center for various goods, particularly in the context of trade and commerce. Some of the key goods that were collected and traded in Mirzapur included:

Opium: Mirzapur was historically known for its opium trade. Opium was a valuable commodity, and the city served as a major trading hub for opium production and distribution.

Cotton: Cotton was another important product collected and traded in Mirzapur. The city was a significant center for cotton trading and played a role in the cotton industry.

Silk: Mirzapur was also known for its silk trade. Silk products, including silk fabrics and textiles, were collected and traded in the city.

Agricultural Products: Mirzapur, being in an agrarian region, was a collection center for various agricultural products, including grains, pulses, and other crops.

Other Goods: Mirzapur served as a hub for the trade of various other goods and commodities, reflecting its role as a center for regional trade and commerce.

So, the correct option is [3].