Explanation:

Section 14 of the Indian Partnership Act, 1932, defines what constitutes the property of a firm. Secret profits made by a partner or property acquired in breach of their duty of good faith are not considered legitimate firm property, although the partner is accountable to the firm for such gains. Goodwill of the business (C) is explicitly included as firm property. Property merely used by a partner for business (B) is also not firm property unless specifically brought into the firm's stock. However, (A) represents illegitimate acquisitions that are fundamentally outside the scope of firm property as defined by Section 14.