Match the following out breeding devices or techniques (Column A) with their correct descriptions or purposes (Column B).
Column A Column B
I Temporal separation of pollen release and stigma receptivity a A method to prevent self-pollination by manually removing anthers and protecting the stigma with a bag
II Spatial separation of anther and stigma b A genetic mechanism that inhibits pollen germination or pollen tube growth from the same flower or plant.
III Self-incompatibility c Ensuring male and female flowers are on different plants or different parts of the same plant.
IV Production of unisexual ﬂowers d The difference in timing of pollen release and stigma becoming receptive to avoid self-pollination.
V Emasculation and bagging e Physical positioning of anther and stigma in different locations within a flower

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I-d, II-e, III-b, IV-c, V-a

I-e, II-a, III-c, IV-b, V-d

I-a, II-b, III-c, IV-d, V-e

I-e, II-a, III-d, IV-b, V-c

answer is A.

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Detailed Solution

	Column A		Column B
I	Temporal separation of pollen release and stigma receptivity	d	A method to prevent self-pollination by manually removing anthers and protecting the stigma with a bag
II	Spatial separation of anther and stigma	e	Physical positioning of anther and stigma in different locations within a flower
III	Self-incompatibility	b	A genetic mechanism that inhibits pollen germination or pollen tube growth from the same flower or plant.
IV	Production of unisexual ﬂowers	c	Ensuring male and female flowers are on different plants or different parts of the same plant.
V	Emasculation and bagging	a	The difference in timing of pollen release and stigma becoming receptive to avoid self-pollination.