Who among the following are eligible to be a part of a mega pension scheme called the 'Pradhan Mantri Shram-Yogi Maandhan scheme'?
1
workers working in central and state public sector units (PSUs) of age from 21 to 55 only.
2
all organized and unorganized workers in India of age 65 years and above.
3
unorganized workers of at least 18 years of age are eligible to join this scheme.
4
all workers part of National Apprenticeship Training Programme.