The structures of citric acid and isocitric acid are displayed. How many chiral centres are present in each acid?
- Acitric acid $= 1$, isocitric acid $= 1$
- Bcitric acid $= 1$, isocitric acid $= 2$
- Ccitric acid $= 0$, isocitric acid $= 1$
- Dcitric acid $= 0$, isocitric acid $= 2$