Step 1: Understand vegetative propagation.
Vegetative propagation is a method of plant reproduction that involves the use of vegetative parts like tubers, stems, and leaves.
Step 2: Review the options.
- Garlic propagates through bulbs, not tubers.
- Amorphophallus uses corms, not tubers.
- Potato uses tubers for vegetative propagation.
- Mango propagates through seeds and grafting, not tubers.
Step 3: Conclude.
Potato uses tubers for vegetative propagation, making option (C) the correct answer.
Final Answer:
\[
\boxed{\text{Potato}}
\]