To solve this question, the user needs to understand the meaning of the acronym FDFU from a TCS perspective.

The correct answer is: A. Foreign Deputation Facilitation Unit

Explanation:

In TCS, FDFU stands for "Foreign Deputation Facilitation Unit". This unit is responsible for facilitating the process of deputing employees to work in foreign countries on behalf of TCS.

Option B is incorrect because "Fair Deputation Facilitation Unit" is not a term used in TCS.

Option C is incorrect because "Foreign Deevelopment Facilitation Unit" is not a term used in TCS.

Option D is incorrect because "Foreign Deputation Faculty Unit" is not a term used in TCS.