• The correct spelling is - Surveillance. (অপশন 'ঘ')
• Surveillance (Noun) English Meaning: Close observation, especially of a suspected spy or criminal. Bangla Meaning: সন্দেহভাজন ব্যক্তির উপর কড়ানজর; পাহারা।
Example Sentence: 1. The police conducted round-the-clock surveillance on the suspect’s house to gather evidence. 2. Surveillance cameras have been installed throughout the city to help reduce crime rates.