JEE Advance - Mathematics (2003 - No. 17)
Orthocentre of triangle with vertices $$\left( {0,0} \right),\left( {3,4} \right)$$ and $$\left( {4,0} \right)$$ is
$$\,\,\left( {3,{5 \over 4}} \right)$$
$$\left( {3,12} \right)$$
$$\left( {3,{3 \over 4}} \right)$$
$$\left( {3,9} \right)$$