Given below are four statements (i)-(iv). Which two of following statements are correct?  

(i) It is estimated that more than 70 percent of world livestock population is in India and China.
(ii) Stringent cleanliness and hygiene (both of cattle and handlers) are of paramount importance while milking, storage and transport of milk and its products.
(iii) Out-breeding is breeding between animals of same breed only.
(iv) Crosses between different breeds is called inbreeding.