In visual basic language what are the rules of a programming language called?

Answer: Option C

In the context of programming languages, the rules that dictate how programs are written and structured are referred to as Syntax. Syntax defines the correct arrangement of symbols, keywords, and other elements in a programming language to create valid and meaningful code. It governs how statements should be formed and how different parts of a program interact with each other.

Option A, Grammar, is related to the structure and rules of a language, but in programming, the more specific term used is Syntax.

Option B, Order, is not the appropriate term for describing programming language rules. While the order of statements is important, the term that encompasses all language rules is Syntax.

Option D, Rules, is a broad term and does not specifically capture the concept of programming language rules. The term used in this context is Syntax.

Therefore, the correct option is Option C: Syntax.