Tina is 10 km North of Ravi; Mohan is 8 km East of Tina; Seema is 6 km South of Mohan. Where is Seema with respect to Ravi?

Step 1: Take Ravi as the fixed reference at (0,0). | Step 3: Continue on the same grid; the successive coordinates are Ravi=(0, 0), Tina=(0, 10), Mohan=(8, 10), Seema=(8, 4). | Step 4: For the requested relation, subtract Ravi's coordinates from Seema's coordinates: (8,4) − (0,0) = (8,4). | Step 5: The horizontal sign points East and the vertical sign points North. | Step 6: Together these signs give North-East; therefore Seema is North-East of Ravi. | Final Answer: Option D — North-East.