Step 1: Understanding the Question:
We need to identify which international organisation Tadao Chino headed as president.
Step 2: Key Formula or Approach:
This is a factual recall question about the leadership of major international financial institutions, so we match the name with the organisation he led.
Step 3: Detailed Explanation:
Tadao Chino, a Japanese career diplomat and finance official, served as President of the Asian Development Bank (ADB), based in Manila, from 1999 onward, leading the bank's work on funding infrastructure and poverty reduction projects across Asia.
UNESCO is a UN cultural and educational body led by a Director-General, not by Tadao Chino, so option (1) is wrong.
UNDP, the United Nations Development Programme, is led by an Administrator, again a different post held by different people, so option (2) is wrong.
The World Bank has historically been headed by American presidents such as James Wolfensohn and later Paul Wolfowitz, not Tadao Chino, so option (4) is wrong.
Step 4: Final Answer:
Tadao Chino headed the Asian Development Bank (ADB), so the answer is option (3).