The correct order of occurrence is as follows:

C. Directive principles of the Indian constitution - The Directive Principles were enshrined in the Indian Constitution at its adoption in 1950.

A. Industrial policy resolution based on schedules - India's Industrial Policy Resolutions were issued in 1948 and 1956, and they provided guidelines for the country's industrial development.

B. Second phase of Green Revolution - The second phase of the Green Revolution in India, often associated with initiatives like the Technology Mission, started in the late 1980s and continued into the 1990s.

D. Foreign exchange reforms - Foreign exchange reforms in India began in the early 1990s as part of the broader economic reforms.

E. Demonetization - Demonetization occurred in India in November 2016.

So, the correct order is 4. C, A, B, D, E.