Select the mismatched pair from the following:

From which plant is a liquid wax obtained that has properties equivalent to sperm whale oil?

Who amongst the following received the Nobel Prize in $1970$ for his outstanding research contribution?

Consider the following statements $(I-IV)$ regarding organic farming:
$I.$ Use of genetically modified crops like $Bt$ cotton.
$II.$ Input of naturally produced compost.
$III.$ No use of urea and pesticides.
$IV.$ Production of vitamin and mineral-rich vegetables.
Which of the above statements are correct?

Assertion : Use of fertilizers greatly enhances crop productivity.
Reason : Irrigation is very important in increasing crop productivity.

The common name of $Leucaena \ leucocephala$ is