The data provided in the table were obtained from the following reaction, carried out at 273 𝐾.
𝐴 + 𝐵 → 𝐶
| Initial concentration of [𝐴] 𝑚𝑜𝑙 $𝐿 ^{−1}$ | Initial concentration of [𝐵] 𝑚𝑜𝑙$𝐿 ^{−1}$ | Initial rate of formation of [𝐶] 𝑚𝑜𝑙 $𝐿^{−1} 𝑠 ^{−1}$ |
| 0.2 | 0.2 | 0.3 |
| 0.4 | 0.2 | 0.6 |
| 0.4 | 0.4 | 2.4 |
The order of the reaction with respect to 𝐴 is _________.