The correct answer is: C. The house was being cleaned by Sharma.
The other options are incorrect because they do not accurately describe the action of cleaning. Option A, “The house was cleaned by Sharma,” implies that the cleaning is already complete. Option B, “The house will be cleaned by Sharma,” implies that the cleaning has not yet begun. Option D, “The house is cleaned by Sharma,” implies that the cleaning is a habitual or repeated action.
The sentence “Sharma was cleaning the house” describes an action that is in progress. The verb “was cleaning” is in the progressive tense, which is used to describe actions that are happening at the time of speaking or writing. In this case, the speaker is describing an action that Sharma is currently doing.
The sentence “Sharma was cleaning the house” can also be interpreted as a description of a habitual or repeated action. For example, if Sharma is a professional cleaner, the sentence could mean that she cleans houses on a regular basis. However, in the context of the question, it is more likely that the speaker is describing an action that is happening at the time of speaking or writing.