Dalajit lent Rs 10800 to Jaabir for 3 years and Rs 7500 to Kabir for 2 years on simple interest at the same rate of interest and received Rs 1422 in all from both of them as interest. The rate of interest per annum is

• A. 3.5 percent
• B. 4 percent
• C. 3 percent
• D. 4.5 percent