If project repat were to acquire another firm that makes or sells similar products in similar markets, it would be an example of

a. hostile takeover.
b. horizontal merger.
c. conglomerate merger.
d. vertical merger

b. Horizontal merger.

Explanation:

Project Repat is merging with a company that produces similar products to its own markets them in similar markets as well, this is an example of a horizontal merger that results in increased synergies between the similar firms and a greater market share opportunity.

Vertical mergers are usually not in the same industry. They would either be with the suppliers of Project Repat or customers who retail Project Repat's products.

Conglomerate is an example of diversification and usually the merging firms have different operations.

There are no information of clashes of any sort within the two  merging companies so it is uncertain whether this is a hostile takeover.

Hope that helps.