Computer Science Fundamentals

Step 1: Understanding the acronym PDF.
PDF stands for Portable Document Format, which is a widely used file format for capturing and presenting documents in a manner independent of software, hardware, or operating systems.

Step 2: Analyzing the options.
- (A) Pure Document Format: This is incorrect. The correct expansion is Portable Document Format.
- (B) Pure Document Font: This is incorrect. PDF is not related to fonts specifically.
- (C) Portable Document Format: This is the correct answer, as PDF is the abbreviation for Portable Document Format.
- (D) Portable Document Font: This is incorrect, as PDF does not stand for "Font."

Step 3: Conclusion.
The correct answer is (C) Portable Document Format.