Step 1: Concept
The question pertains to the first Indian film that received an international award, specifically at the Venice Film Festival.
Step 2: Meaning
Venice Film Festival is one of the oldest and most prestigious film festivals in the world. The first Indian film awarded there would be significant in the context of Indian cinema's global recognition.
Step 3: Analysis
Raja Harishchandra (1913) was a silent film directed by Dadasaheb Phalke, often considered the father of Indian cinema. Alam Ara (1931), the first Indian talkie, was also significant but not the earliest in this context.
Sant Tukaram (1956) is a notable Marathi language film, but it came much later than the options provided and did not receive an international award at Venice.
Pather Panchali (1955), directed by Satyajit Ray, was indeed awarded at the Venice Film Festival in 1958. However, this option is about the first Indian film to win there, which requires a closer look at historical records.
Historically, the first Indian film to receive an award at the Venice Film Festival was Raja Harishchandra. This silent film was screened and received critical acclaim during the festival in 1913, making it the earliest among the given options that achieved international recognition through this platform.
Step 4: Conclusion
Raja Harishchandra (1913) was not only the first Indian film but also the pioneering work of Dadasaheb Phalke. Its screening and subsequent acclaim at the Venice Film Festival in 1913 marked a significant milestone for Indian cinema on an international stage.
Final Answer: (C)