Given that \[v\] is speed, \[r\] is the radius and \[g\] is the acceleration due to gravity. Which of the following is dimensionless [CET 1998]

• A.             \[{{v}^{2}}/rg\]       
• B.             \[{{v}^{2}}r/g\]
• C.             \[{{v}^{2}}g/r\]       
• D.             \[{{v}^{2}}rg\]