Understanding the Question: Sanskrit compounds (Samāsa) are classified by which part of the compound is semantically dominant. We need to identify the one where the second part (Uttara-pada) is the main part.
Key Concepts and Approach:
Pūrvapada-pradhāna (First part dominant) = Avyayībhāva.
Uttarapada-pradhāna (Second part dominant) = Tatpuruṣa.
Ubhayapada-pradhāna (Both parts dominant) = Dvandva.
Anyapada-pradhāna (External part dominant) = Bahuvrīhi.
Detailed Solution:
Step 1: Analyzing Tatpuruṣa. In a Tatpuruṣa compound, the second word provides the primary object, while the first word modifies it. For example, in Rāja-puruṣa (King's man), the compound refers to a "man" (puruṣa), not a "king." Since puruṣa is the second member, the compound is Uttarapada-pradhāna.
Step 2: Checking other types. In Dvandva (e.g., Rāma-Kṛṣṇa), both are important. In Bahuvrīhi, the compound refers to a third person entirely.
Conclusion: The Tatpuruṣa Samāsa is characterized by the dominance of the second member.