Deduction u/s 80G

Deduction u/s 80G is restricted to 10% of Gross Total Income. For some donations paid the quantum of deduction is restricted to 50% of the amount donated.

My Gross Total Income is Rs.5,10,000 . I have donated an amount of Rs.5 Lakh which are eligible for 50% deduction.

What is the eligible deduction for this case?

Is it Rs.51,000 ?

(5,00,000*50% - restricted to 10% of 5,10,000 = 51,000) or

Rs.25,500

(5,10,000*10%*50%  = 25500)