Which is the most productive country of silk?

The United Nations came into existence on:

The Dead Sea is located between which two countries

Match List-I with List-Il and choose the correct option from the code given below-

 List-I (Treaty)                    List-II (Year)

(a) Treaty of Versailles     (i) 1920

(b) Treaty of Paris            (ii) 1919

(c) Treaty of Trianon       (iii) 1925

(d) Treaty of Locarno      (iv) 1783

Code -

Which are the largest mountain ranges in the world?

Which one of the following is not a landlocked country in Africa?

When is the World Population Day observed?

Where is the residence of the Lai tribe?