Step 1: Features of a Profession.
Professions typically have certain features that distinguish them from other occupations. These features include:
Step 2: Analyzing the options.
- (A) Well-defined body of knowledge: Professions typically have a specialized and well-documented body of knowledge that practitioners must understand.
- (B) Existence of theoretical knowledge: Theoretical knowledge is the foundation of a profession, often based on studies, research, and specialized education.
- (C) Entry restricted on the basis of examination or education: Most professions require specific qualifications, examinations, or certifications to ensure competence.
- (D) Dominance of service motive: Professionals are often driven by the desire to serve the public good, rather than purely financial incentives.
Step 3: Conclusion.
All four features are essential characteristics of a profession, so the correct answer is option 3: (A), (B), (C) and (D) only.
Final Answer:
\[
\boxed{\text{The correct answer is (3) (A), (B), (C) and (D) only.}}
\]