Explanation:

- Two trains are moving in opposite directions.

- Train lengths are 130 meters and 150 meters.

- Their speeds are 52 km/hr and 74 km/hr.

- Convert their speeds to meters per second:

- 52 km/hr = 52 * (1000/3600) = 14.44 m/s.

- 74 km/hr = 74 * (1000/3600) = 20.56 m/s.

- Relative speed when moving in opposite directions: 14.44 + 20.56 = 35 m/s.

- Total length to cross: 130 + 150 = 280 meters.

- Time to cross each other = Total length / Relative speed = 280 / 35 = 8 seconds.

- Option 2, 8 seconds, is correct.

Answer: Option 2: 8