Out of the given alternatives given choose the most appropriate option.
World War I and World War II took place ____________ the 20th century.

Correct option is B

The correct option to fill in the blank is (b) in.
• Explanation:
– For events occurring within a time period, we use the preposition "in".
– "World War I and II took place in the 20th century" is grammatically and contextually correct.
• Grammatical rule used:
– Use "in" for non-specific times during a day, month, year, or century.
• Explanation in Hindi:
– किसी लंबे समय के संदर्भ में जैसे वर्ष, सदी आदि में "in" का प्रयोग होता है।
• Example:
– Computers became popular in the 21st century. ✅
Meanings of the other options:
• (a) on ❌
– English: Used for specific days and dates.
– Hindi: के दिन
• (c) at ❌
– English: Used for specific points of time.
– Hindi: पर
• (d) into ❌
– English: Shows movement toward the inside of something.
– Hindi: के भीतर