What lengthy mountain range, extending from Myanmar through Thailand to Malaysia, forms the spine of the Malay Peninsula?

• A Tenasserim Hills ✓
• B Annamite Range
• C Himalayas
• D Shan Hills

The Tenasserim Hills (Thanon Thong Chai) form a natural border between Thailand and Myanmar, stretching over 1,600 kilometres down the Malay Peninsula.