Thanks people for the inputs.
I've gone for the class 1 and apparently I had some unexpected problems which may pose a risk in me not being able to clear it.
I have a heart condition... called something like DRBBB or something like that where in my heart the (current)? whe passes through takes a longer time to travel than that on the left when both should reach at the same time. There is a possibility that I might have to see a cardiologist.
Next my small build - I guess small lungs as well.. I couldn't pass the spirometry test. The results should I have a mild constriction in my lungs. The DME said that he's confident I have nothing wrong with my lungs just that I'm small built therefore smaller lungs hence smaller air capacity than most people but don't know how the authorities would think though.
Though the doctor said that height and weight or BMI is not a factor or at least being underweight is not. That's for the part of the world I'm in.