Answer :

To find the correct equation that shows the relationship between the Kelvin (K) and Celsius (°C) temperature scales, let's break down each of the options given:

1. OK="F + 273
- This equation suggests a relationship between Kelvin (K) and Fahrenheit (F), which is incorrect because the usual formula is between Kelvin and Celsius.

2. OK = "C + "F
- This equation is not standard and doesn't clearly indicate any straightforward mathematical relationship. It seems incorrect.

3. OK = °C + 273
- This equation is almost correct, but it’s missing a small component to be fully accurate.

4. OK = 273 - C
- This equation suggests subtracting the Celsius temperature from 273 to get Kelvin, which would mean the temperatures are inversely related, which is incorrect.

After examining all the given options, the correct relationship between Kelvin (K) and Celsius (°C) is given by:

[tex]\[ K = °C + 273.15 \][/tex]

However, since 273.15 can be approximated to 273 for simplicity, option three aligns closely if stated more precisely.

Thus, the best option among the given choices that shows the relationship closely is:

OK = °C + 273

Nevertheless, remember that for higher precision, the correct relationship should technically include 273.15.