The correct answer is option 'A': August 30, 1992.

India's first indigenous helicopter, the Advanced Light Helicopter (ALH), was successfully flown in Bangalore on August 30, 1992. This was a significant milestone in the country's aviation history, as it showcased India's capability to design and manufacture helicopters locally.

The Advanced Light Helicopter (ALH)
The Advanced Light Helicopter (ALH), also known as Dhruv, was developed by the Hindustan Aeronautics Limited (HAL) in collaboration with the Indian Army, Indian Navy, and Indian Air Force. It is a versatile multi-role helicopter designed to meet the diverse operational requirements of the Indian armed forces.

Key Features and Capabilities
- The ALH is capable of performing various tasks including troop transport, reconnaissance, casualty evacuation, anti-submarine warfare, anti-tank warfare, and search and rescue missions.
- It has a seating capacity of up to 12 passengers or two stretchers along with medical attendants.
- The helicopter is powered by two Shakti turboshaft engines, which provide it with excellent power and performance.
- It has a maximum speed of 290 km/h (180 mph) and a range of 630 km (390 miles).
- The ALH incorporates advanced technology and features to enhance its operational efficiency and safety.

Significance of the Indigenous Helicopter
The successful flight of the ALH marked a major achievement for India's aviation industry. It demonstrated the country's ability to develop and manufacture advanced helicopters locally, reducing dependence on imports and promoting self-reliance in defense production. This indigenous capability has not only strengthened the armed forces but also contributed to the growth of the aerospace industry in India.

Further Developments and Variants
Since its first flight, the ALH has undergone continuous development and improvement. It has been used extensively by the Indian armed forces and has also been exported to several countries. The ALH has been adapted into various variants, including the armed version for combat operations, the naval version for maritime operations, and the civilian version for commercial and civil applications.

Overall, the successful flight of India's first indigenous helicopter, the ALH, on August 30, 1992, was a significant milestone in the country's aviation history. It showcased India's technological capabilities and paved the way for further advancements in indigenous defense production.