Consider the following statements:
$A$. $NF_3$ molecule has a trigonal planar structure.
$B$. Bond length of $N_2$ is shorter than $O_2$.
$C$. Isoelectronic molecules or ions have identical bond order.
$D$. Dipole moment of $H_2S$ is higher than that of water molecule.
Choose the correct answer from the options below:

• A
  $A$ and $D$ are correct
• B
  $C$ and $D$ are correct
• C
  $A$ and $B$ are correct
• D
  $B$ and $C$ are correct