For photo-electric effect with incident photon wavelength λ , the stopping potential is  V0. Identify the correct variation(s) of V0 with  λ and 1/λ .

Kmax=E-w0 ⇒V0e=hcλ−w0   ⇒V0=hce1λ−w0e V0,1λ  graph is in the from of y = mx – cOption C is correct.Clearly,  V0,λ graph is a curve. V0  decreases with increase in  λ. V0 becomes zero when  hcλ=w0i.e. λ=λ0  (Threshold wavelength)  Option A is correct.