Elaters of Marchantia are

Haploid

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Diploid

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Triploid

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Polyploid

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Solution

The correct option is B Diploid
In Marchantia particularly it appears that only some of the spore mother cells (Sporocytes) which are diploid remain diploid and undergo change to form elaters.
The other ( Majority of them ) undergo meiosis to form haploid spores.
So in Marchantia the elaters are diploid.

Suggest Corrections

Column A	Column B
(A)Gracilaria	(i)Biflagellate zoospores
(B)Ectocarpus	(ii)Elaters
(C)Marchantia	(iii)Biflagellate antherozoids
(D)Cycas	(iv)Carpogonium (v)Multiciliated magle gamates