The book titled "Development Planning - the Indian Experience" was authored by Sukhamoy Chakravarty. Let's explore why this answer is correct and examine the other options provided:

1. Sukhamoy Chakravarty: He was a renowned Indian economist, best known for his work on socio-economic development and planning. He played a significant role in shaping India's economic policy and was a member of the Planning Commission. His contributions are significant in the field of development economics, and his insights are reflected in the book "Development Planning - the Indian Experience".
2. S.N. Sen: Although S.N. Sen is an author, he is not related to this specific work on development planning. His contributions do not focus primarily on this subject, thus ruling out this option.
3. Amartya Sen: Another notable Indian economist, Amartya Sen is famous for his work in welfare economics and social choice theory. Although he has contributed extensively to economic literature, "Development Planning - the Indian Experience" is not among his works.
4. Adam Smith: A Scottish economist and philosopher, Adam Smith is best known for his works "The Wealth of Nations." His contributions laid the foundations of classical economics, but he is unrelated to the modern Indian economic context or the book in question.

Thus, considering the context and expertise in development planning in India, the correct answer is Sukhamoy Chakravarty.