Lala Lajpat Rai, known as the ‘Lion of Punjab,’ was a key leader in the:

The correct answer is: a) Swadeshi Movement.

Lala Lajpat Rai was a prominent Indian nationalist who was a key leader in the Swadeshi Movement. The Swadeshi Movement was a boycott of British goods and the promotion of Indian-made goods. It was a major turning point in the Indian independence movement.

The other options are incorrect.

• The Revolutionary movements were a series of armed uprisings against British rule in India.
• The Khilafat Movement was a pan-Islamic movement that was launched in 1919 to protest the British government’s decision to abolish the Ottoman Caliphate.
• The Quit India Movement was a mass protest movement launched in 1942 by Mahatma Gandhi and the Indian National Congress.