A starts business with Tk. 3,500 and after 5 months, B joins A with some capital. After a year, if the profit is divided in the ratio 2 : 3. Then B’s contribution in the total capital is -

• ক Tk 7000
• খ Tk 8000
• গ Tk 9000 ✅ সঠিক উত্তর
• ঘ Tk 1200