Answer:
a and b are correct
Explanation:
This is because, the total voltage V across capacitors in series equals sum of voltages on each capacitor.
So, V = V₁ + V₂
Since the same current flows in each capacitor in series, the charge is the same. So Q = Q₁ = Q₂
Q/C = Q₁/C₁ + Q₂/C₂ = Q/C₁ + Q/C₂