Correct option is A
Only Statements A, B and C align with the three tests of a core competency as defined by Prahalad and Hamel in their foundational work on the topic. Core competencies are the unique strengths of a corporation that provide a competitive edge and allow synergy across its business units.
A. Core competencies must be difficult for competitors to imitate –
A core competency must be unique and not easily replicable by competitors. This ensures sustainable competitive advantage.
B. Different businesses in the corporation must be similar in at least one important way –
This similarity allows for synergistic benefits across units by leveraging the same core capabilities, technologies, or processes.
C. Core competence must enhance competitive advantage by creating superior customer value –
For a capability to be a core competency, it must benefit the customer by providing value that is superior to competitors, which in turn strengthens the firm’s market position.
Information Booster:
Prahalad & Hamel (1990) identified three criteria for core competencies:
They provide access to a wide variety of markets
They contribute significantly to customer value
They are difficult for competitors to imitate
Core competencies help firms unify various strategic business units (SBUs) under a common strength such as technology, distribution, or brand.
These competencies are often embedded in organizational knowledge, skills, and technological capabilities.
Examples include Honda’s engine design, 3M’s adhesive technologies, or Apple’s product design and integration.
Additional Knowledge:
D. Core competencies must facilitate business diversification through shared activities with competing firms –
This statement confuses core competency development with strategic alliances or joint ventures. Core competencies should enable diversification within the firm, not through partnerships with competitors.
E. Core-competencies must leverage business resources with competing firm to reduce business costs –
Cost reduction through collaboration is an external strategy, more related to outsourcing, alliances, or supply chain partnerships. It is not a criterion for defining internal core competencies.

