Abha purchased a house from Avas Parishad on credit. If the cost of the house is Rs. 64000 and the rate of interest is 5% per annum compounded half-yearly, find the interest paid by Abha after one and a half year.

• A.  Rs. 4900  
• B.  Rs. 4921        
• C.  Rs. 4810        
• D.      Rs. 4700