Explanation:

The correct answer is:

(D) Both 0x and 0X

Explanation:

In most programming languages (such as C, C++, Java, JavaScript, and Python), a hexadecimal literal starts with either 0x or 0X. Both notations are valid and indicate that the number is in hexadecimal (base 16) format.

Examples:

• 0x1A3F (Hexadecimal representation of 6719 in decimal)
• 0XFF (Hexadecimal representation of 255 in decimal)

Thus, the correct answer is (D) Both 0x and 0X.