Meray kahnay ka matlab hai k un main se konsa subject asisa hai jis main easily marks ziada lia ja skaty hai.n
ap apnya D grade wala subject share kero then he koi suggestion da saktya hain sub.
I think, any subject which has given you D grade cannot be so easy for you to improve. You got to access yourself and decide that which subject to be selected. Keep your strengths and weaknesses in mind. God bless you and give you strength to improve your grading. Aameen