Which of the following representations correctly explains the function of a mitochondrion?

In the circuit shown in the figure,the $AC$ source gives a voltage $V = 20 \cos (2000 t)$. Neglecting source resistance,the voltmeter and ammeter readings will be:

In a $\triangle ABC$,the expression $\frac{(a+b+c)(b+c-a)(c+a-b)(a+b-c)}{4b^2c^2}$ is equal to:

$540\, g$ of ice at $0^\circ C$ is mixed with $540\, g$ of water at $80^\circ C$. The final temperature of the mixture is

If $A = \begin{bmatrix} 0 & 2 \\ 3 & -4 \end{bmatrix}$ and $hA = \begin{bmatrix} 0 & 3a \\ 2b & 24 \end{bmatrix}$,then the values of $h, a, b$ are respectively

Which among the following is a dicarboxylic acid?