Trade and cultural exchange between Assam and neighboring regions led to:

The correct answer is d) All of the above.

Trade and cultural exchange between Assam and neighboring regions led to the influx of new ideas, the development of hybrid art forms, and linguistic influences.

• The influx of new ideas can be seen in the adoption of new religions, such as Hinduism and Buddhism, as well as the introduction of new technologies, such as ironworking and rice cultivation.
• The development of hybrid art forms can be seen in the fusion of Assamese and neighboring art styles, such as the Mughal style of painting.
• Linguistic influences can be seen in the borrowing of words from neighboring languages, such as Bengali and Sanskrit.

These exchanges have helped to shape the unique culture of Assam.