For the reaction, \[P\text{ }+\text{ }Q+\text{ }R\to S\] Experimental data for the measured initial rates in given below. Expt. (P) (Q) (R) Initial rate (in \[m{{s}^{-1}}\]) 1. 0.2M 0.5M 0.4M \[8.0\times {{10}^{-5}}\] 2. 0.4M 0.5M 0.4M \[3.2\times {{10}^{-4}}\] 3. 0.4M 2.0M 0.4M \[1.28\times {{10}^{-3}}\] 4. 0.1M 0.2M 1.6M \[4.0\times {{10}^{-8}}\] The order of the reaction with respect of P, Q and R respectively is

• A. 4, 1, 3
• B. 2, 2, 1
• C. 1, 2, 1
• D. 2, 1, 1