A regular grammar is a

Correct Option is: A. Context free grammar

Solution:

A regular grammar is a Context free grammar.

• A context -free grammar(CFG) is a bunch of recursive revising rules used to create examples of strings. A CFG comprises the accompanying parts: a bunch of terminal images, which are the characters of the letters in order that show up in the strings produced by the language.
• Any language that can be created utilizing normal articulations can be produced by a context-free grammar, yet not all context-free languages are ordinary languages. Context-free languages are depicted by context-free grammars, which can be created by push down automata. Regular grammar is either correct or left straight, though context-free grammar is essentially any blend of terminals and non-terminals.