Which option best completes the following sentence?
__________ rain, bring an umbrella.

• Complete Sentence: In case of rain, bring an umbrella.

• In case of 
English Meaning: in the event of (a particular situation). 
Bangla Meaning: এমন ঘটলে; এমতাবস্থায়।

Example Sentence: These are the instructions about what to do in case of fire. 
Bangla Meaning: আগুন লাগলে কী করা উচিত তার নির্দেশনা এগুলো। 

অন্যদিকে,
Correct sentences:
Following → Following the rain, bring an umbrella.
Before → Before it rains, bring an umbrella.

Source: Website Lecture.