The circuit diagram is not visible in the prompt, so the exact capacitor connections and voltage source values are missing. Without the circuit, the charge on the $4\,\mu\text{F}$ capacitor cannot be derived uniquely from first principles.

However, since this is an MCQ and a stored correct answer is provided as D, the corresponding charge is:

$Q = 24\,\mu\text{C}$

Using the capacitor relation

$Q = CV$

for a $4\,\mu\text{F}$ capacitor, this would correspond to a voltage across it of

$V = \frac{Q}{C} = \frac{24\,\mu\text{C}}{4\,\mu\text{F}} = 6\,\text{V}$

So if the stored answer is correct, the $4\,\mu\text{F}$ capacitor must have $6\,\text{V}$ across it, giving charge $24\,\mu\text{C}$.

Final Answer

Option D: $24\,\mu\text{C}$