Step 1: Conceptual Foundation:
This inquiry necessitates familiarity with the historical development of Indian television, specifically identifying the inaugural soap opera aired on the national broadcaster, Doordarshan.
Step 2: Granular Analysis:
A detailed examination of the provided options and their respective broadcast timelines is required:
- Hum Log (1984-1985): Commencing on July 7, 1984, this series is widely recognized as the pioneering soap opera or sponsored serial broadcast on Indian television. Its narrative centered on the quotidian challenges and aspirations of a middle-class family, achieving substantial popularity.
- Karamchand (1985-1988): This program was a well-received detective series, distinct from the soap opera genre.
- Buniyaad (1986-1987): A significant drama serial addressing the Partition of India, it was telecast subsequent to "Hum Log," which had already established the format for extended family dramas.
- Tamas (1988): This critically acclaimed television film or miniseries was adapted from Bhisham Sahni's novel. It did not fall under the category of a soap opera.
Step 3: Definitive Conclusion:
From a chronological perspective, "Hum Log" predates the other options in its broadcast and is credited as India's inaugural television soap opera. Consequently, option (D) constitutes the accurate response.