Select the correct option to fill up the blanks in the following statements.
(i) Controlling breeding experiments are carried out using _____.
(ii) In MOET technology, the fertilised eggs at _____ cells stages, are recovered and transferred to surrogate mothers.
(iii) In MOET technology, the cow produces ______ eggs instead of one egg.
(iv) ______ is an industry devoted to the catching, processing or selling of fish.