Explanation:

- The book "Choice of Techniques" explores economic development and the selection of technologies.

- Option 1: A. K. Sen - Correct. Amartya Kumar Sen, a renowned economist and Nobel laureate, authored "Choice of Techniques" which discusses methods of industrialization in developing economies.

- Option 2: K. N. Raj - A prominent economist, but not associated with this particular book.

- Option 3: V. K. R. V. Rao - Known for contributions to Indian economics, but not the author here.

- Option 4: Sukhamoy Chakravarty - An influential economist, involved in planning, but not the author of this book.