You are given a statement written in Assamese. Choose the most logical word from the given 4 options which can be used to replace the <MASK> token in the statement. Output the word from the correct option .

Statement: |Between 1965 and 1994, the first Sunday of October. Since 1994, on October 5, coincides with the World Teachers' Day (est. 1994 by <MASK>).

 Option A: UNESCO

 Option B: কাটাৰ

 Option C: Thailand

 Option D: আজাৰবাইজান
UNESCO