Which of the following fish is not a freshwater fish?

Which of the following fish species was introduced into India from abroad?

Which of the following is a marine food fish?

Freshwater edible fishes - $P$
Marine edible fishes - $Q$
$I -$ Catla, $II -$ Mackerel, $III -$ Hilsa, $IV -$ Sardines
$V -$ Rohu, $VI -$ Pomfrets, $VII -$ Common carp
Select the correct option for $P$ and $Q$.
$\quad\quad\quad P \quad\quad \quad Q$

Which of the following statements is false?

Which of the following groups is consistent (all are marine fishes)?