Which volume part of Harivansh Rai Bachchan's biographical masterpiece series is titled 'क्या भूलूँ क्या याद करूँ'?

Harivansh Rai Bachchan's celebrated and highly acclaimed autobiography was published in four distinct chronological parts:
1. Part 1: 'क्या भूलूँ क्या याद करूँ' (Published in 1969)
2. Part 2: 'नीड़ का निर्माण फिर' (Published in 1970)
3. Part 3: 'बसेरे से दूर' (Published in 1977)
4. Part 4: 'दशद्वार से सोपान तक' (Published in 1985)

Thus, 'क्या भूलूँ क्या याद करूँ' is the first part of his autobiography series.