Explanation:

Railway Receipt:
A railway receipt is a document issued by a railway company that acknowledges the receipt of goods to be transported by rail. It serves as evidence of the contract of carriage between the shipper (consignor) and the railway company. The railway receipt contains important information about the goods, such as the details of the consignor and consignee, the description of the goods, the weight, and the destination.

Key Points:
- A railway receipt is issued by the railway company.
- It acknowledges the receipt of goods.
- It serves as evidence of the contract of carriage.
- Contains important information about the goods.

Bill of Lading:
A bill of lading is a document issued by a carrier (such as a shipping or freight company) to acknowledge the receipt of goods for shipment. It is primarily used in maritime transport but can also be used in other modes of transportation such as air and road. The bill of lading serves as a contract of carriage, a receipt of goods, and a document of title to the goods.

Key Points:
- A bill of lading is issued by a carrier.
- It acknowledges the receipt of goods for shipment.
- It serves as a contract of carriage, a receipt, and a document of title.

Dock Warrant:
A dock warrant is a document issued by a warehouse operator or dock authority to acknowledge the receipt of goods for storage in a specific warehouse or dock. It is commonly used in situations where goods are stored temporarily before being transported to their final destination. The dock warrant serves as evidence of the ownership of the goods and can be used to transfer the ownership of the goods.

Key Points:
- A dock warrant is issued by a warehouse operator or dock authority.
- It acknowledges the receipt of goods for storage.
- It serves as evidence of ownership and can be used to transfer ownership.

Conclusion:
In the context of the question, a document issued by a railway company that acknowledges the receipt of goods is known as a railway receipt. The railway receipt is specific to the transportation of goods by rail and contains important information about the goods being transported. The bill of lading is a similar document but is used in maritime transport. The dock warrant is a document used for the storage of goods in a warehouse or dock. Therefore, the correct answer is option 'B' - Railway Receipt.