Which of the following is the world's most problematic aquatic weed?

Match the plants given in Column-$I$ with their type of endosperm or seed characteristic in Column-$II$. Choose the correct answer from the options given below.

Column-$I$	Column-$II$
$i$. Coconut	$a$. Helobial
$ii$. Balsam	$b$. Perisperm
$iii$. Asphodelus	$c$. Nuclear
$iv$. Black pepper	$d$. Cellular

Progeny resulting from cross pollination are

Angiospermic plants are characterised by:
$I.$ Double fertilisation
$II.$ Triploid endosperm
$III.$ Diploid endosperm
Choose the correct option from the following regarding the above statements.

Which of the following statements is incorrect?

Which of the following is an incorrect pair?