Choose the correct statement/statements -

(i) Presumption of law is based on the provisions of law.

(ii) The position of presumption of law is certain and uniform. 

(iii) Presumption of law is derived on established judicial norms and they have become part of legal rules.

(iv) Presumptions of facts are derived on the basis of law of nature, prevalent customs and human experience.

(v) The position of presumption of fact is certain and uniform

(vi) Presumption of fact is always rebuttable and goes away when explained or rebutted by establishment of positive proof.