For the reaction \[X+Y\to Z,\] following kinetic data was obtained : Initial [X]M Initial [Y]M Initial rate M \[\mathbf{mi}{{\mathbf{n}}^{\mathbf{-1}}}\] 0.4 2.0 \[6.2\times {{10}^{-3}}\] 0.8 2.0 \[2.48\times {{10}^{-2}}\] 0.4 4.0 \[1.24\times {{10}^{-2}}\] 0.5 1.5 ? Calculate initial rate in the last experiment

• A. \[\text{4}.\text{36}\times \text{l}{{0}^{-\text{3}}}\]
• B. \[\text{5}.\text{81}\times \text{l}{{0}^{-\text{3}}}\]
• C. \[\text{7}.\text{27}\times \text{l}{{0}^{-\text{3}}}\]
• D. \[\text{9}.\text{69}\times \text{l}{{0}^{-\text{3}}}\]