The unclaimed certificates lying in the custody of the Postal Accounts Office are
preserved for a period of
a) 30 years from the dates of maturity after which these become due for destruction
b) 30 years from the dates of issue after which these become due for destruction
a) 20 years from the dates of maturity after which these become due for destruction
b) 10 years from the dates of maturity
preserved for a period of
a) 30 years from the dates of maturity after which these become due for destruction
b) 30 years from the dates of issue after which these become due for destruction
a) 20 years from the dates of maturity after which these become due for destruction
b) 10 years from the dates of maturity