The four basic effects that media produce in sequence are:  

(A) Amplification, retrieval, displacement, conversion. 

(B) Conversion, retrieval, amplification, displacement. 

(C) Amplification, retrieval, displacement, conversion. 

(D) Amplification, displacement, retrieval, conversion.

Correct Ans: (A)

Explanation:
Media produces four basic effects in a sequential process: amplification, retrieval, displacement, and conversion. This sequence highlights how media evolves and impacts society at different stages.

1. Amplification: To begin with, media amplifies certain messages, ideas, or events, thus increasing their visibility and influence. This stage emphasizes the power of media to magnify its impact on audiences.
2. Retrieval: Subsequently, media retrieves or brings back certain forms, content, or styles from earlier communication methods. This effect demonstrates how media draws on historical patterns and cultural memory.
3. Displacement: Next, media displaces older technologies or methods by providing more efficient alternatives. Consequently, this stage reflects how newer media innovations make traditional systems less relevant.
4. Conversion: Finally, media leads to a complete conversion by transforming cultural practices, beliefs, and communication habits. Over time, this shift alters the way societies function and interact.

Thus, the correct answer is (A): Amplification, retrieval, displacement, conversion. Each stage builds on the previous one to explain the dynamic effects of media on communication and society.