A plot of the kinetic energy `((1)/(2) mv^(2))` of ejected electrons as a function of the frequency (v) of inciden radiation for four alkali metals `(M_(1),M_(2), M_(3), M_(4))` is given below:

The alkali metals `(M_(1),M_(2), M_(3), M_(4))` are respectively. : Li, Na, K and Rb; Rb, K, Na and Li; Na, K, Li and Rb; Rb, Li, Na and K

Options

A. Li, Na, K and Rb
B. Rb, K, Na and Li
C. Na, K, Li and Rb
D. Rb, Li, Na and K

Answer

B

Explanation

Intercept on v-axis denotes `v_(0)`.
`v_(0) =(phi)/(h)" where "phi` = work function of the metal
Thus, greater is the value of `v_(0)`, more will be the work function of the metal.