The temperature at which Centigrade thermometer and Kelvin thermometer give the same reading, is

Options

A. `4^(@)`
B. `273^(@)`
C. not possible
D. zero

Explanation

To find the temperature at which the Centigrade (Celsius) thermometer and Kelvin thermometer give the same reading, we can start with the relationship between the two temperature scales.

### Step 1: Understand the relationship between Celsius and Kelvin
The relationship between Celsius (C) and Kelvin (K) is given by the formula:
\[ K = C + 273.15 \]
This means that to convert a temperature from Celsius to Kelvin, you add 273.15.

### Step 2: Set the two temperatures equal
We want to find the temperature where both scales give the same reading. Therefore, we set:
\[ C = K \]

### Step 3: Substitute the relationship into the equation
Using the relationship from Step 1, we can substitute K with C:
\[ C = C + 273.15 \]

### Step 4: Simplify the equation
Now, we simplify the equation:
\[ C - C = 273.15 \]
\[ 0 = 273.15 \]

### Step 5: Analyze the result
The equation \( 0 = 273.15 \) is not true, indicating that there is no temperature at which the readings on the Celsius and Kelvin scales are the same.

### Conclusion
Thus, there is no temperature at which the Centigrade thermometer and Kelvin thermometer give the same reading. The answer is that it is **NOT POSSIBLE**.

---