Which of the following pairs represent of the same physical quantities?

Options

A. Kelvin and joule
B. Kelvin and calorie
C. Newton and calorie
D. joule and calorie

Explanation

To determine which of the given pairs represent the same physical quantities, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option A: Kelvin and Joule**
- **Kelvin** is a unit of temperature.
- **Joule** is a unit of energy.
- Since temperature and energy are different physical quantities, this option is incorrect.

2. **Option B: Kelvin and Calorie**
- **Kelvin** is again a unit of temperature.
- **Calorie** is a unit of energy (specifically, it is the amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius).
- As both units represent different physical quantities (temperature vs. energy), this option is also incorrect.

3. **Option C: Newton and Calorie**
- **Newton** is a unit of force.
- **Calorie** is a unit of energy.
- Since force and energy are different physical quantities, this option is incorrect as well.

4. **Option D: Joule and Calorie**
- **Joule** is a unit of energy.
- **Calorie** is also a unit of energy.
- Since both Joule and Calorie represent energy, this option is correct.

### Conclusion:
The correct answer is **Option D: Joule and Calorie**, as both represent the same physical quantity, which is energy.

---