Correct option is A
The error lies in option (a).
Explanation:
- The phrase Alongside the monsoon season is incorrect because alongside means “together with/beside,” not “during.”
- Here, we need a time-related preposition to show the period when something happens, such as during or in.
Correct sentence (one correct form):
- During the monsoon season between June and September, the unbroken Western Ghats chain acts as a barrier to the moisture-laden clouds.
Grammatical rule (English):
- Use during/in to indicate time/period; alongside indicates position or accompaniment, not duration.
व्याकरण नियम (Hindi):
- समय बताने के लिए during/in का प्रयोग होता है; alongside का अर्थ “के साथ/बगल में” होता है, “के दौरान” नहीं।
So the correct answer is (a)