Where was oil first found in independent India? 

Nahorkatia, Assam 

The correct answer is option 1. Nahorkatia, Assam.

The history of oil discovery in Digboi, Assam, is closely tied to the early development of the petroleum industry in India. The Digboi oil field is considered one of the oldest oil fields in the world. Here's a brief explanation:

1. Discovery:  In 1889, while the region was still under British rule, oil was first discovered in the Digboi area by a geologist named Goodenough. The discovery was made during the exploration for coal, and the initial oil well, locally known as the "Discovery Well," was drilled in 1890.

2. Commercial Production: The commercial production of oil in Digboi began in 1901, making it the first oil well in India. The Assam Oil Company, later known as the Assam Oil Company Limited (AOCL), played a key role in the development of the Digboi oil fields.

3. Significance: The Digboi oil field became a significant contributor to India's early oil production and played a vital role in meeting the energy demands of the time. The development of the Digboi oil fields marked the beginning of the Indian petroleum industry, paving the way for further exploration and production activities in the country.

Overall, Digboi holds historical importance as the site of the first oil discovery and commercial production in independent India, marking a crucial milestone in the country's energy history.