History

The Harappan Civilization used the Lost Wax Process, also known as the \textit{cire-perdue} method, for making bronze figurines. This technique involves creating a wax model, covering it with clay, heating it to remove the wax, and then pouring molten metal into the mold. One of the most famous examples of this technique is the Dancing Girl figurine found at Mohenjo-Daro.
Thus, the correct answer is Lost Wax Process.

The study of pre-history relies on multiple disciplines:
1. Geomorphology - Helps in understanding landforms and environmental changes over time.
2. Paleobotany - Studies ancient plant remains to reconstruct past environments and human interactions.
3. Paleoanthropology - Focuses on human evolution and the study of ancient human fossils and artifacts.
Since all three disciplines contribute significantly to pre-historic studies, the correct answer is All of the three.

Jai Prakash Narayan led the call for Total Revolution (\textit{Sampoorna Kranti}) in 1974 against corruption and government misrule. His movement played a crucial role in mobilizing people against the authoritarian rule during the Emergency period (1975-1977), ultimately leading to the fall of Indira Gandhi's government.
Thus, the correct answer is Jai Prakash Narayan.