The correct punctuation separates two independent clauses using a semicolon, and "it's" means it is.
Hence, the correct sentence is It's raining; I should take an umbrella.
🎓 MAH CET MCA📅 Year: 2025📚 English🏷 Spotting Error
2
Find the part with an error:
"The committee have decided to postpone their meeting until next week."