Correct Answer - Option 1 : 210 kJ/min

**Explanation:**

A ton of refrigeration (TR), also called a refrigeration ton (RT), is a unit of power used, especially to describe the heat-extraction capacity of refrigeration and air conditioning equipment.

It is defined as the rate of heat transfer that results in the melting of 1 ton of pure ice at 0°C in 24 hours.

The unit conversions is:

- 1 TR = 210 kJ/min = 3.5 kW
- 1 k-cal = 4.18 kJ
- 1 kJ = 0.239 k-cal
- 210 kJ = 50.19 k-cal
- 1 TR = 50.19 k-cal/min = 3011.52 k-cal/hr