Which of the following is not economically useful?

Identify the correct statement.

Which one of the following pairs are fresh water carps?

Which human requirement is as ancient as human evolution?

Which of the following is primarily used to make noodles?

Statement $P$: New varieties are developed through processes like grafting,tissue culture,cloning,and hybridization.
Statement $Q$: It provides necessary information regarding the identification of collected,certified,and newly discovered plant specimens.