Explanation:

- Two trains are moving toward each other with lengths of 230 m and 240 m, respectively.

- They initially stand 130 m apart on parallel tracks.

- Their speeds are 160 km/h and 200 km/h, respectively.

- The total effective length that needs to be covered is the sum of their lengths plus the distance between them: 230 + 240 + 130 = 600 meters.

- Convert speeds from km/h to m/s:

- 160 km/h = 160 * 1000/3600 ˜ 44.44 m/s

- 200 km/h = 200 * 1000/3600 ˜ 55.56 m/s

- Combine their speeds: 44.44 m/s + 55.56 m/s = 100 m/s

- Time taken to cross each other = total length / relative speed = 600 m / 100 m/s = 6 seconds.

The correct answer is Option 2: 6 seconds.

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