For a gaseous state,if the most probable speed is denoted by $C^*$,average speed by $\overline{C}$,and root mean square speed by $C$,then for a large number of molecules,the ratio of these speeds is:

• A
  $C^* : \overline{C} : C = 1.225 : 1.128 : 1$
• B
  $C^* : \overline{C} : C = 1.128 : 1.225 : 1$
• C
  $C^* : \overline{C} : C = 1 : 1.128 : 1.225$
• D
  $C^* : \overline{C} : C = 1 : 1.225 : 1.128$