Correct Answer:
C. Listed relatives (mother, sister, etc.)
Under Section 20(d), the power to nominate a successor is typically restricted to a specific listed relatives (mother, sister, etc.). This provision aims to ensure that succession rights remain within a defined family structure, preventing arbitrary nominations outside the immediate or legally recognized family unit. Nominating 'Any friend' would be too broad and is generally not permitted for legal succession to property rights. 'Only blood relatives' might be too restrictive, as some acts include in-laws or adopted family. 'Only male relatives' is discriminatory and not a common restriction in such succession laws, which usually include female relatives.