Topic: Sentence (বাক্য),

Best Answer Explained in Below-:

The correct word to fill in the blank in the question "What’s this ______ English?" is "in." The phrase "in English" is commonly used to refer to the use or presentation of information in the English language. For example, when someone asks for a translation of a text, they may say, "Can you provide this in English?" This indicates that the requestor is looking for the content to be expressed or delivered using the English language.

The preposition "in" suggests an inclusion or a medium through which something is expressed. In contrast, the other options—"at," "on," and "*”—do not fit idiomatically in this context. For instance, "at English" would be incorrect because "at" usually refers to a specific location or event rather than a language. "On English" might imply a topic or subject matter related to English, but does not convey the same meaning as "in English." Thus, "in" is the most appropriate choice, effectively linking the subject to the linguistic medium being referenced.