Explanation:

- Two trains start from Delhi and Poona at 7 a.m., traveling towards each other.

- The speed of the Delhi train is 85 km/h.

- The speed of the Poona train is 67 km/h.

- They cross each other at 3:30 p.m., meaning they traveled for 8.5 hours.

- To find the distance, compute the combined distance covered:

$$

\text{Distance} = (\text{Speed of Delhi train} + \text{Speed of Poona train}) \times \text{Time} = (85 + 67) \times 8.5 = 1292.5 \text{ km}

$$

- Rounding to the nearest whole number gives 1292 km.

- Correct Answer: Option 2 - 1292 km