Q: What is presumption of law ?

Ans: Presumption of law are of two types i.e.,  rebuttable Presumption or Irrebutable Presumption.  

Sections 86, 87, 88, 90 and 114 of evidence act are examples of presumption of fact or the examples of may presume. 

The presumption of law comprises of rebuttable and irrebutable presumption.