Ans is 3
business logic and domain objects
https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller
Model
The central component of the pattern. It is the application's dynamic data structure, independent of the user interface.[4] It directly manages the data, logic and rules of the application.
View
Any representation of information such as a chart, diagram or table. Multiple views of the same information are possible, such as a bar chart for management and a tabular view for accountants.
Controller
Accepts input and converts it to commands for the model or view.[5]
In addition to dividing the application into these components, the model–view–controller design defines the interactions between them.[6]
