\(\omega=v / r\)
\(\omega\) is the Constant of Proportionality, \(v\) is the Velocity of the Particles which is directly proportional to the distance of the particles from the axis \((r).\)
\(\therefore v \propto r\)
\(\Rightarrow v=\omega \times r\)
since, \(\omega\) is the constant of Proportionality, its value will be remains same for the given values of \(v\) and \(r .\)
\(\therefore\) Option \((d)\). is correct.