In a language class, a child of class VI answered the teacher in Hindi and in between he used one sentence in English. What is this known as ?

Correct option is A

Code-switching
In a language class, when a child of class VI answers the teacher in Hindi and uses one sentence in English in between, this is known as code-switching. Code-switching is the practice of alternating between two or more languages or varieties of language in conversation. It is a common linguistic phenomenon in multilingual societies and can occur within a sentence or across sentences. This switching often reflects the speaker's comfort level with each language and the context in which the conversation is taking place.