Statement: Producer-wholesaler-retailer-customer is the most common and traditional channel of distribution.

Explanation:
Introduction to Distribution Channels:
Distribution channels are the pathways through which goods and services flow from producers to consumers. They play a crucial role in bringing products to the market and ensuring their availability to the end customers.

Types of Distribution Channels:
There are various types of distribution channels based on the number of intermediaries involved. Some of the common types include:
1. Direct Distribution: In this channel, the producer sells products directly to the end customer without involving any intermediaries.
2. Indirect Distribution: In this channel, intermediaries such as wholesalers, retailers, and agents are involved in the distribution process.

Producer-Wholesaler-Retailer-Customer Channel:
The statement suggests that the most common and traditional channel of distribution is the one involving producers, wholesalers, retailers, and customers. Let's analyze this statement:

1. Producer:
The producer refers to the entity or individual that manufactures or creates the goods or services. They are the initial source of the product.

2. Wholesaler:
Wholesalers are intermediaries who purchase goods in large quantities from producers and sell them to retailers or other businesses. They play a vital role in the distribution process by providing storage, transportation, and bulk purchasing advantages.

3. Retailer:
Retailers are businesses that sell products directly to the end customers. They act as a bridge between wholesalers and consumers, offering convenience and a wide range of products.

4. Customer:
Customers are the final consumers who purchase and use the products or services.

Traditional Distribution Channel:
The producer-wholesaler-retailer-customer channel has been a widely used traditional distribution channel for a long time. It follows a sequential flow of products from the producer to the end customer.

Advantages of Producer-Wholesaler-Retailer-Customer Channel:
1. Efficient Flow: This channel allows for a smooth and efficient flow of goods from the producer to the end customer.
2. Expertise: Each intermediary in the channel specializes in their respective roles, bringing expertise and efficiency to the distribution process.
3. Risk Sharing: The involvement of intermediaries helps in sharing risks and responsibilities, reducing the burden on producers.
4. Market Coverage: This channel provides wider market coverage as wholesalers and retailers operate in different locations, making the products more accessible to customers.

Conclusion:
In conclusion, the statement is true. The producer-wholesaler-retailer-customer channel is indeed the most common and traditional channel of distribution. However, it is important to note that with the advent of e-commerce and technological advancements, new distribution channels such as direct-to-consumer and online marketplaces have gained significant popularity.