Which of the following is an example of broadcast mode of communication?

Options

A. Radio
B. Television
C. Mobile
D. Both a and b

Explanation

To determine which of the given options is an example of broadcast mode of communication, we need to understand what "broadcast" means in the context of communication systems.

### Step-by-Step Solution:

1. **Understand the Definition of Broadcast Communication**:
- Broadcast communication refers to a mode where signals are transmitted from a single source (transmitter) to multiple receivers simultaneously. This means that the same information is sent out to a wide audience at the same time.

2. **Analyze Each Option**:
- **Option A: Radio**:
- Radio broadcasts signals from a radio station to multiple listeners at the same time. Therefore, this qualifies as a broadcast mode of communication.
- **Option B: Television**:
- Television also transmits signals from a broadcasting station to many viewers simultaneously. This too qualifies as a broadcast mode of communication.
- **Option C: Mobile**:
- Mobile communication typically involves a one-to-one connection between a transmitter (the mobile phone) and a receiver (another mobile phone). This does not fit the definition of broadcast communication, as it is not sending the same information to multiple receivers at the same time.
- **Option D: Both A and B**:
- Since both radio and television are examples of broadcast communication, this option is also correct.

3. **Conclusion**:
- The correct answer is **Option D: Both A and B** (Radio and Television) as they both exemplify the broadcast mode of communication.

### Final Answer:
The example of broadcast mode of communication is **Option D: Both A and B (Radio and Television)**.