The correct answer is option 'A' - datafld.

Explanation:
The datafld attribute is used to specify the column name from the data source object. It is commonly used in HTML to bind data from a data source to a specific column in a table or form.

Here is a detailed explanation of each attribute mentioned in the question:

a) datafld: This attribute is used to specify the column name from the data source object. It is used in conjunction with other attributes like datasrc and dataformatas to bind data to an HTML element.

b) codebase: This attribute is used to specify the base URL for all relative URLs in the code of the object element. It is typically used when embedding objects like Java applets or Flash animations.

c) hspace: This attribute is used to specify the amount of horizontal space to be added around an HTML element. It is primarily used with images to control the spacing between the image and surrounding content.

d) datasrc: This attribute is used to specify the URL of the data source object. It is used in conjunction with other attributes like datafld and dataformatas to bind data to an HTML element.

In the context of the question, the attribute that specifically specifies a column name from the data source object is the datafld attribute.

Example:
Let's say we have a data source object with multiple columns such as "name", "age", and "email". If we want to bind the "name" column to a specific HTML element, we can use the datafld attribute.

```html

Name	Age	Email

```

In the above example, the datafld attribute is used to specify the column names from the data source object for each table cell. This allows the data to be dynamically populated from the data source.