Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — Salween
Concept & Option Breakdown
Standard Reference VerifiedThe river indicated on the map forms part of the international boundary between Myanmar and Thailand before draining into the Gulf of Martaban / Andaman Sea; this is the Salween River (Thanlwin). The Irrawaddy flows entirely through central Myanmar.
The river marking the eastern border of Myanmar with Thailand is the Salween River.
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