Which of the following is true regarding hyperconjugation, also known as no-bond resonance? 
(i) Like inductive effect it involves donation of electrons through s bonds 
(ii) Hyperconjugation involves overlapping of filled orbitals with the empty p orbital of the carbocation 
(iii) Like resonance, it involves displacement of z or lone pair of electrons to the carbon bearing positive charge 
(iv) It involves delocalisation of s and p-electrons