The correct answer is A. Trigarta coins.
The Khasas were a people who lived in the northwestern part of the Indian subcontinent. They were known for their distinctive style of art and architecture, which is often referred to as the “Khasas style.” The earliest evidence of this style is found on coins from the Trigarta kingdom, which was located in what is now the Punjab region of Pakistan. These coins date from the 2nd century BCE and depict a variety of Khasas motifs, including stylized animals, geometric patterns, and human figures.
The Audumbara coins, which date from the 1st century BCE, also depict some Khasas motifs, but they are more heavily influenced by the art of the Kushan Empire. The Kuluta coins, which date from the 2nd century CE, are even more heavily influenced by Kushan art, and they do not show any significant Khasas elements. The Kulindas coins, which date from the 3rd century CE, are also heavily influenced by Kushan art, but they do show some evidence of Khasas influence, such as the use of stylized animals.
In conclusion, the earliest evidence of Khasas style is found on coins from the Trigarta kingdom. These coins date from the 2nd century BCE and depict a variety of Khasas motifs, including stylized animals, geometric patterns, and human figures.