Arrange the following incidents of the twentieth century in chronological order:

A- John Marshall and Alfred Foucher published 'The Monuments of Sanchi'
B- Sanchi was declared a World Heritage Site
C- Prime Minister Jawaharlal Nehru laid the foundation stone of the 'National Museum', New Delhi
D- John Marshall published the Conservation Manual

A-D-C-B

The correct answer is Option 2- A-D-C-B

A- John Marshall and Alfred Foucher published The Monuments of Sanchi in 1914.
D- John Marshall published the Conservation Manual in 1923.
C- Prime Minister Jawaharlal Nehru laid the foundation stone of the National Museum, New Delhi in 1955.
B- Sanchi was declared a World Heritage Site in 1989.