Step 1: Understanding the purpose.
The cricketer wants to distinguish his products in the market and show that they come from his company. This requires a sign, logo, or name associated with his business.
Step 2: Matching with IP categories.
(a) Patents protect inventions — not applicable here.
(b) Copyright protects creative works like books, music, designs — not primarily for product source identification.
(c) Trademark protects brand identifiers such as logos, names, or symbols that distinguish goods/services — directly applicable.
(d) Geographical indication applies to goods linked to a specific location — irrelevant here.
Step 3: Conclusion.
Trademark is the correct IP protection to indicate product source.
\[
\boxed{(c)}
\]