which book is Written by Dr.S.Radha Krishnan ?

The correct option is Indian Philosophy.

Dr. Sarvepalli Radhakrishnan was a highly distinguished Indian philosopher, scholar, and statesman who served as the first Vice President and the second President of India. Among his many contributions to philosophy and literature, his seminal work is titled Indian Philosophy. Published in two volumes (Volume 1 in 1923 and Volume 2 in 1927), this monumental work provides a comprehensive and systematic exposition of the major schools of Indian philosophical thought, including the Vedas, the Upanishads, Buddhism, Jainism, and the six orthodox systems of Hindu philosophy (Darshanas).

To understand why the other options are incorrect, let us examine their authors:
1. India Divided: This famous book was written by Dr. Rajendra Prasad, the first President of India, and was published in 1946.
2. India's Priceless Heritage: This book was written by the eminent Indian jurist and liberal economist Nani Palkhivala.
3. The world’s largest democracy: This is a descriptive term widely used for India and is not a book authored by Dr. S. Radhakrishnan.