C) numerals
One of the significant mathematical breakthroughs that originated in India is the development of the decimal numeral system, also known as the Hindu-Arabic numeral system. This numeral system introduced the concept of zero and the use of positional notation, which is the basis for our modern numerical representation.
The Indian mathematicians made remarkable contributions to the field of mathematics, including the development of the decimal system around the 6th to 7th century CE. This numeral system, along with the concept of zero, revolutionized mathematics and greatly facilitated mathematical calculations, algebraic operations, and advancements in various branches of mathematics.