Which of the following was a factor responsible for the popular support of planning during the 1940s and 1950s in India?

All of the above

In India, despite the various differences, there was a consensus on one point: that development could not be left to private actors, that there was a need for the government to develop a design or plan for development

Factors responsible for the popular support of planning during the 1940s and 1950s:

A- The Experience of the Great Depression in Europe.
B- The inter-war reconstruction of Japan and Germany.
C- The spectacular economic growth against heavy odds in the Soviet Union in the 1930s and 1940s.

Thus 'D', All of the above is the correct answer.