The new technique of painting adopted by Artist Ravi Verma due to the colonial encounter:

Perspective and illusionism

The correct answwer is option 3: Perspective and illusionis

In 1870 Ravi Varma received his first paid commission to paint the portrait of Kizhakke Palat Krishna Menon’s family.This is a transitional work which blends elements of a flatter, two-dimensional style popular within earlier water-colours with the newer techniques of perspective and illusionism, made possible by the use of a medium like oil.