Anekantavada is a core theory and philosophy of which one of the following ........

Explanation:

Anekantavada:  Emphasises that the ultimate truth and reality is complex, and has multiple-aspects i.e theory of plurality.
It refers to the simultaneous acceptance of multiple, diverse, even contradictory viewpoints.
Syadvada: All judgments are conditional, holding good only in certain conditions, circumstances, or senses.Syadavada literally means the ‘method of examining different probabilities’.
The basic difference between them is that Anekantavada is the knowledge of all differing but opposite attributes whereas Syadavada is a process of the relative description of a particular attribute of an object or an event.