Haplontic life cycle is followed by:

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(A) In a haplontic life cycle,the dominant,photosynthetic phase is the free-living gametophyte $(n)$.The zygote $(2n)$ is the only diploid stage,which

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Algae

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(A) In a haplontic life cycle,the dominant,photosynthetic phase is the free-living gametophyte $(n)$.The zygote $(2n)$ is the only diploid stage,which undergoes meiosis to produce haploid spores $(n)$.These spores divide mitotically to form the gametophyte.This type of life cycle is characteristic of many algae,such as $Volvox$ and $Spirogyra$,and some species of $Chlamydomonas$.

Column-$I$	Column-$II$
$(A)$ Blue-green algae	$(p)$ Chlamydomonas
$(B)$ Unicellular algae	$(q)$ Spirogyra
$(C)$ Filamentous algae	$(r)$ Volvox
$(D)$ Colonial algae	$(s)$ Nostoc

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Assertion $(A)$: Algae are autotrophic in their mode of nutrition.
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Column-$I$ lists various types of algae, and Column-$II$ lists examples of algae. Select the correct option.
Column-$I$ Column-$II$
$(A)$ Blue-green algae $(p)$ Chlamydomonas
$(B)$ Unicellular algae $(q)$ Spirogyra
$(C)$ Filamentous algae $(r)$ Volvox
$(D)$ Colonial algae $(s)$ Nostoc

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