Tangents are drawn to the hyperbola x²/9-y²/4=1
parallel to the straight line 2x−y=1. The points of contacts of the tangents on the hyperbola are____
O (9/2√2, 1/√2)
O (-9/2√2, -1/√2)
O (3√3, -2√2)
O (-3√3, 2√2)