विद्यालय की घंटी छुट्टी का संदेश किस प्रकार देती है?
How does a school bell communicate the message of dismissal?
Explanation opens after your attempt
D. ध्वनि संकेत द्वाराThrough an audio signal
Concept
Students understand the message by hearing the fixed sound of the bell. Treat it as audio signal communication in exams.
Why this answer is correct
The correct answer is D. ध्वनि संकेत द्वारा / Through an audio signal. Students understand the message by hearing the fixed sound of the bell. Treat it as audio signal communication in exams.
Exam Tip
घंटी की निश्चित ध्वनि सुनकर विद्यार्थी संदेश समझते हैं। परीक्षा में इसे श्रव्य संकेत संचार मानें।
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