From a point on a bridge across the river, the angles of depression of the banks on opposite sides of the river are 30 and 45 respectively. If the bridge is at a height of 2.5 m from the banks, then the width of the river is (Take

• A. 5.83 metre
• B. 6.83 metre
• C. 5.76 metre
• D. 6.87 metre