For the reaction system: \[2NO\left( g \right)+{{O}_{2}}\left( g \right)\to 2N{{O}_{2}}\left( g \right)\] volume is suddenly reduced to half its value by increasing the pressure on it. If the reaction is of first order with respect to \[{{O}_{2}}\] and second order with respect to NO, the rate of reaction will

• A. diminish to one-eighth of its initial value
• B. increase to eight times of its initial value
• C. increase to four times of its initial value
• D. diminish to one-fourth of its initial value