AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Radio (All India Radio / Akashwani) would be the most effective medium.
Reasons:
Source: Chapter 7, Mass Communication section
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Examiners expect you to name one specific medium and justify it with 2–3 reasons directly from the chapter. Radio is the textbook answer here because the passage explicitly states AIR broadcasts in local languages for various categories of people and mass communication creates awareness about national programmes. Avoid vague answers like "television" without justification — TV requires electricity and a set, which may not suit remote areas. Always link your reason back to the specific context given in the question (remote + no internet + no newspapers).