Which one of the following sentences expresses ‘possibility’?
There are dark clouds in the sky. _____ .

Question

Accepted Answer

Option 3, "It may rain," is the correct answer because it expresses the possibility of rain occurring. The word "may" is commonly used to indicate that something is possible but not certain. In this context, the presence of dark clouds suggests that rain is a possibility, but it is not guaranteed. Therefore, "It may rain" accurately conveys this uncertainty and potentiality.

Now, let's examine why the other options are incorrect:

1. **Option 1: It will rain** - The word "will" indicates certainty or a strong likelihood that something is going to happen. Saying "It will rain" suggests that rain is definite, which does not align with the idea of possibility. The presence of dark clouds alone does not guarantee rain, so this option does not express possibility.

2. **Option 2: It shall rain** - The word "shall" is often used to express a strong intention or determination, particularly in formal contexts. It can also imply a future action that is expected to happen. However, it does not convey the uncertainty or possibility that "may" does. Therefore, "It shall rain" does not appropriately express the idea of possibility.

3. **Option 4: It must rain** - The word "must" indicates necessity or obligation, suggesting that rain is inevitable. This option implies certainty rather than possibility. Since the question asks for a sentence that expresses possibility, "It must rain" is not suitable because it does not allow for any uncertainty.

In conclusion, Option 3, "It may rain," is the only choice that accurately reflects the possibility of rain given the presence of dark clouds, without implying certainty or necessity.