Lala Lajpat Rai is the author of the book :

India Divided
Hind Swaraj
Unhappy India
Mother India

The correct answer is: C. Unhappy India

Lala Lajpat Rai was an Indian nationalist who was a prominent leader of the Indian independence movement. He was a member of the Indian National Congress and was also a founder of the All-India Hindu Mahasabha. He was assassinated by a British police officer in 1928.

Unhappy India is a book written by Lala Lajpat Rai in 1908. The book is a collection of essays that Rai wrote about the condition of India under British rule. In the book, Rai argues that India is an unhappy country because it is under the rule of a foreign power. He also argues that the British are responsible for the poverty and backwardness of India.

The other options are incorrect because:

  • India Divided is a book written by V. P. Menon in 1950. The book is a history of the partition of India.
  • Hind Swaraj is a book written by Mahatma Gandhi in 1909. The book is a critique of British rule in India.
  • Mother India is a book written by Katherine Mayo in 1927. The book is a critical account of Indian culture and society.