Four traffic lights give red signal in 30 seconds, 45 seconds, 60 seconds and 120 seconds respectively. If all the traffic lights start at the same time, then all will give red signal at the same time.

• A. 180 सेकेण्ड
• B. 120 सेकण्ड में
• C. 300 सेकण्ड में
• D. 360 सेकण्ड में