Read the following statements?
(i) Only Pu show maximum oxidation state of +7 in actinoids. 
(ii) $M^{+4}$ ion of Th is the only diamagnetic $M^{+4}$ ion of actinoid series.
(iii) Electrons present in the 5f orbitals of actinides can participate in bonding to a greater extent as compared to electrons present in 4f orbitals of lanthanides.
(iv) Magnetic properties of actinoids are more complex than lanthanoids
Which of the following is the correct code for the statements above?