In the following question, a sentence is given in the passive voice: "Rohan was not told about the e-mail." Out of the four alternatives, select the sentence that best expresses the same meaning in the active voice.

Introduction / Context:
Voice change questions check your understanding of how to convert sentences from passive voice to active voice and vice versa without changing the essential meaning. The given sentence is in the passive voice, focusing on Rohan as the person affected by the action. Your task is to choose the active voice version that is natural, grammatically correct and semantically equivalent.

Given Data / Assumptions:

• Passive sentence: Rohan was not told about the e-mail.
• We need an active voice sentence with a clear subject performing the action.
• Options provide different possible subjects and structures: Nobody, Somebody, The e-mail, There was nobody who could tell.
• The meaning to preserve is that Rohan did not receive the information about the e-mail from anyone.

Concept / Approach:
In a passive sentence, the focus is on the receiver of the action, while the doer is either hidden or introduced with by. When converting to active voice, we normally bring in an explicit subject to represent the implied doer. In Rohan was not told about the e-mail, the implied meaning is that no person told him. The most straightforward active form therefore uses Nobody as the subject: Nobody told Rohan about the e-mail. We avoid awkward constructions where inanimate objects like e-mail become the grammatical subject of tell, because that sounds unnatural in standard English.

Step-by-Step Solution:
Step 1: Identify the object and subject in the passive sentence. Rohan is the person acted upon, and the action is was not told about the e-mail. The doer is unspecified but clearly refers to people in general. Step 2: To convert to active voice, choose a sensible subject. Since no one told him, the natural active subject is Nobody. Step 3: Construct the active sentence: Nobody told Rohan about the e-mail. This has a clear subject (Nobody), a simple past verb (told), an indirect object (Rohan) and a prepositional phrase about the e-mail. Step 4: Compare this with option A, which exactly matches that structure, so option A is a strong candidate. Step 5: Evaluate the other options and notice that they either add unnecessary elements or become grammatically awkward, which confirms that option A is the best equivalent.

Verification / Alternative check:
You can use a standard passive to active pattern: X was not told about Y by anyone becomes Nobody told X about Y. Replacing X with Rohan and Y with the e-mail gives Nobody told Rohan about the e-mail, exactly matching option A. The time reference (past) and the negation (not) are both preserved. The focus on Rohan remains, but in active voice we put the new negative subject at the beginning, which is fully acceptable.

Why Other Options Are Wrong:
Somebody did not tell Rohan about the e-mail suggests that there was one particular person who failed to tell him, but it does not convey that nobody at all informed him. It weakens the meaning.
The e-mail was not told about to Rohan is grammatically incorrect because we do not usually say tell about to with e-mail as the subject; it also sounds unnatural and does not follow normal English idiom.

Common Pitfalls:
There was nobody who could tell Rohan about the e-mail is long and changes the meaning slightly. It suggests lack of ability or possibility rather than simply the fact that nobody did tell him. In voice change questions, examiners prefer the cleanest structure that matches tense, negative form and sense as closely as possible. Students sometimes overcomplicate the answer by adding could or unnecessary clauses. Keeping it simple and direct is usually the safest approach.

Final Answer:
The correct active voice form is Nobody told Rohan about the e-mail.