⟩ Laura invests a part of Rs. 12,000 in 12% stock at Rs. 120 and the remainder in 15% stock at Rs. 125. If his total dividend per annum is Rs. 1360, how much does he invest in 12% stock at Rs. 120? A. Rs. 4000 B. Rs. 4500 C. Rs. 5500 D. Rs. 6000