This is a question on offset link mechanism. The required instruments are compass, ruler and French curve., A good attempt will begin by figuring out the working principle of the link with respect to the crank OA, link rod AB, and slider BE. , The circle of the crank OA should then be divided into twelve equal parts and the corresponding positions of the links and slider be determined by using a compass. A suitable curve wou1d then be drawn on the various positions of point B obtained to complete the locu.
Some candidates failed the question because they did not figure, out the working
  principle of the mechanism before attempting the question                          .         .
The expected solution is given below