<span>With respect to major rivers, the Mekong is to Vietnam as the Irrawaddy is to A. Myanmar.</span>
Explain the question more, then i can awncer it.
Answer:
Lesotho totally relies on South Africa for imports and exports because of Option B) Lesotho is completely landlocked by South Africa.
Explanation:
Lesotho's economy relies heavily on farming and the country is economically integrated with South Africa. Formal employment is largely restricted to garment workers who are overwhelmingly female. Men tend to migrate to work in the mines in South Africa. Another major employer in Lesotho is the government. A lot of the farming and animal husbandry practiced is small scale and informal in Lesotho.

Radium ( a radioactive element having atomic number 88 ) was discovered by Marie Sklodowska Curie in year 1898.