Explanation:

Bhagat Singh belonged to a generation that was to intervene between two decisive phases of the Indian national movement - the phase of the 'Extremism' of Lal-Bal-Pal and the Gandhian phase of nonviolent mass action.

• In 1924 in Kanpur, he became a member of the Hindustan Republican Association, started by Sachindranath Sanyal a year earlier. The main organiser of the Association was Chandra Shekhar Azad and Bhagat Singh became very close to him.
• In 1925, Bhagat Singh returned to Lahore and within the next year he and his colleagues started a militant youth organisation called the Naujawan Bharat Sabha.
• In 1928, Bhagat Singh changed the name of Hindustan Republican Association to Hindustan Socialist Republic Association (HSRA). In 1930, when Azad was shot, the HSRA collapsed. Naujawan Bharat Sabha replaced HSRA in Punjab.

Hence both statements are correct.