Best supplement to increase Stamina and Endurance?

Hi, my name is yougeshwar and i want to increase my strength and endurance. Actually i applied for in UP police and for PET they conduct racing so i want to know that is there any way by which i can increase my strength as well as endurance to cross this paper. Please tell me as soon as possible.

Best supplement for building stamina are :-

1. Floradix Liquid Iron Formula
2. Lucozade energy gel
3. PowerBar Ride Bar
4. Kinetica 100% recovery
5. PhD Battery

Best supplement for building endurance :-

1. Ultima
2. Body Octane
3. Cordygen VO2 Ultra
4. BCAA's (ex: Recover Pro)