Match column $I$ with column $II$, and choose the correct combination from the options given below.

	Column $I$		Column $II$
a	$Chara$	1	Monoecious
b	$Marchantia$	2	Dioecious
c	Cucurbits
d	$Cycas$
e	$Pinus$

The correct option is B $\begin{array}{ccccc}\text{a}& \text{b}& \text{c}& \text{d}& \text{e}\\ 1& 2& 1& 2& 1\end{array}$
$Chara$-monoecious
$Chara$ possesses both the antheridia (male reproductive structure) and oogonia (female reproductive structure) on the same plant. Hence it is monoecious.

$Marchantia$-dioecious
$Marchantia$ is considered dioecious because it has separate male and female thallus which bear antheridiophore and archegoniophore respectively.

Cucurbits-monoecious
Cucurbits have male and female flowers on the same plant. Thus they are said to be monoecious.

$Cycas$-dioecious
In $Cycas$ male and female reproductive structures, microsporophylls and megasporophylls respectively, are borne on separate plants. Thus, it is dioecious.

$Pinus$-monoecious
$Pinus$ bears both the male and female cones on the same plant. Hence it is said to be monoecious.

Final answer
(a) 1 2 1 2 1