Which of the following alkyl halides will undergo `S_N1` reaction most readily ?

Read the passage given below and answer the following questions: Aryl halides are extremely less reactive towards nucleophilic substitution reactions due to the following reasons: (i) In haloarenes, the electron pairs on halogen atom are in conjugation with u-electrons of the ring. (ii) In haloalkane, the carbon atom attached to halogen is sp^3 hybridised while in case of haloarene, the carbon atom attached to halogen is sp^2 -hybridised. In case of haloarenes/ the phenyl cation formed as a result of self-ionisation will not be stabilised by resonance. Which of the following alkyl halides will undergoes S_N1 reaction most readily ?

Which of the following alkyl halides will undergo S_(N)1 reaction most readily-

Which of the following alkyl halides will undergo S_(N)1 reaction most redily ?

Which of the following alkyl halides will undergo S_(N)1 reaction most redily ?

Which of the following alkyl halides will undergo S_(N)1 reaction most redily ?

Which of the following alkyl halide will undergo S_N 1 reaction is