42 days
normally no leave are sanctioned during exam days except special circumstances.
you don’t need a new GPF account. you can continue the same account. that’s better.
you need to apply your DDO for that.
I found an old order related to your query. https://wbxpress.com/special-instruction-madhyamik-pariksha-2016/
West Bengal Recognized Non-Government Educational Institution Employees’ (Management of General Provident Fund Accounts) Scheme, 1995 is applicable for School Staffs
01.01.2013: https://wbxpress.com/grant-of-dearness-relief-to-state-govt-pensioners-family-pensioners-wef-01-01-2013/ 01.01.2014: https://wbxpress.com/dearness-relief-state-govt-pensioners-wef-january-2014/ 01.01.2015: https://wbxpress.com/dearness-relief-state-govt-pensioners-january-2015/ 01.01.2016: https://wbxpress.com/dearness-relief-state-govt-pensioners-january-2016/ 01.01.2017: https://wbxpress.com/dearness-relief-state-govt-pensioners-january-2017/ 01.01.2018: https://wbxpress.com/dearness-relief-state-govt-pensioners-january-2018/
Annual income should be less than 2.5 lac.
See the Latest Notification (15-01-2016) on this issue
you will not get interim relief.