He wrote biographies of Mazzini, Garibaldi, Shivaji and Shrikrishna; stayed in America for some time; and was also elected to the Central Assembly. He was

1. A

   Aurobindo Ghosh

   (a) Aurobindo Ghosh. He was a revolutionary, yogi and theorist of Poorna Swaraj, not the author of those Mazzini–Garibaldi–Shivaji–Krishna biographies who sat in the Central Assembly after a US sojourn. This letter is not the key.

2. B

   Bipin Chandra Pal

   (b) Bipin Chandra Pal. Pal was a Lal–Bal–Pal extremist orator. The biographical set, American stay and Central Assembly membership fit Lala Lajpat Rai, not Pal, so this is not the key.

3. C

   Lala Lajpat Rai

   (c) Lala Lajpat Rai. (c) Official key: Rai wrote on Mazzini, Garibaldi, Shivaji and Shrikrishna, lived in the United States for a period, and was elected to the Central Legislative Assembly. That cluster matches the stem and the stored key.

4. D

   Motilal Nehru

   (d) Motilal Nehru. Motilal led the Swaraj Party and chaired the Nehru Report; he is not the Punjab leader of those biographies. This is not the key.

Summary. Official key is (c) Lala Lajpat Rai. The Punjab leader authored those nationalist biographies, spent time in America, and sat in the Central Assembly. Aurobindo, Bipin Pal and Motilal Nehru fail the same cluster of facts. Honour the stored letter (c).