Explanation:

When you use a SEMI COLON (:) in a PRINT statement, the items are printed without any spaces between them.

Let's understand the different options given in the question and why option 'A' is the correct answer.

a) SEMI COLON (:)

The semicolon (:) is used to separate statements in Python. When used in a PRINT statement, it concatenates the items without any spaces between them. For example:

```python
print("Hello", "World", sep=":")
```
Output: Hello:World

In this example, the strings "Hello" and "World" are printed without any spaces between them. The colon acts as a separator.

b) TAB

The tab character (\t) is used to insert a horizontal tab space in a string. It is not used to separate items in a PRINT statement. For example:

```python
print("Hello\tWorld")
```
Output: Hello World

In this example, the tab character inserts a horizontal tab space between "Hello" and "World".

c) SPACE

A space character is used to separate items in a PRINT statement by default. For example:

```python
print("Hello", "World")
```
Output: Hello World

In this example, a space is automatically inserted between "Hello" and "World".

d) COMMA (,)

The comma (,) is used to separate items in a PRINT statement. It automatically adds a space between the items. For example:

```python
print("Hello", "World", sep=",")
```
Output: Hello, World

In this example, a comma is used to separate "Hello" and "World", and a space is automatically added between them.

Therefore, the correct answer is option 'A' - SEMI COLON (:) - because it prints the items without any spaces between them.