SDA and HRA

dearness Allowance is fully taxable....for HRA you have to calculate....least of the following will be exempt.from actual HRA received
1.Actual HRA
2 Rent paid - 10% of salary
3. 50% or 40% of the salary as the case may be..........if you are in Chennai,Mumbai, Delhi, Kolkata it's 50 other cases 40
for the purpose of salary in this case includes all taxable allowances

as per section 10 you get deduction of hra
1. total hra received in a FY
2. total rent paid in a FY minus 10% of salary(basic+DA)
above point 1 and point 2 which ever is lower,
you get deduction u/s 10

sir, what about SDA

1. Special Duty allowances are allowances provided to an employee who is engaged in the services of Noth Eastern states.  
2. According to sec 17(2) perquisites also includes any special duty allowances received from the employer
3. As per sec 10(14), any allowances received or the actual amount of expenses incurred as referred to in sec 17(2) will be exempt from payment of tax.
4.  Hence, in your case, Special Duty Allowance will be exempt from payment of tax. 

Please correct me if the above solution has an alternative view.

sir, also heard same, just need to confirm, hence can I take all amount exemption and also standard deduction of Rs 40000 also

1. Yes, you can. Standard deduction was substituted for conveyance allowance and Medical reimbursement. Hence, you can claim both. 
Please correct me if the above solution has an alternative view.