(a) the principle of tilakkhana or in some context is also called " theory of three Characteristics" is one of the exalted principle of Buddhism. The theory profoundly explains the general trait and characters of the nature of beings and physical world.
In the commentaries , the three characteristics of existence are also referred to as universal characteristics or samanna-lakkhanaa in other words , common to all things. The three characteristics of Existence, within Buddhism are three mark shared by all conditioned things . according to Buddhist tradition, a full understanding of these three can bring and end to suffering (Dukkhaniroha)