225. In a city with 1,000,000 cars, and each car travels an average of 10,000 kilometers per year, using a catalytic converter reduces the percentage of several pollutants produced and the amount of pollutants after using the catalytic converter in one year will be how many tons? (Read the options from right to left.)
| NO | $C_xM_y$ | CO | | Pollutant |
| $1/\circ f$ | $1/\mathit{6}V$ | $\mathit{6}$ | Without converter | Amount of pollutant per kilometer |
| $\circ/\circ f$ | $\circ/\circ V$ | $\circ/\mathit{6}$ | With converter | grams per kilometer |
(1) $Y1\circ\circ \cdot \Lambda\Delta$ (2) $Y\Delta\circ\circ \cdot \Lambda\Delta$ (3) $Y1\circ\circ \cdot 9Y$ (4) $Y\Delta\circ\circ \cdot 9Y$