Nucleus of Noctiluca is

Haploid

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Diploid

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Triploid

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Tetraploid

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Solution

The correct option is B Diploid
A haploid organism carries the chromosomes number as is present in gametes of that organism, gametes contain half the chromosomes of the somatic cells. Option A is incorrect.
Noctiluca, a dinoflagellate, is a colourless phototroph which exhibits bioluminescence. Since, individual diatoms are diploids, hence, Noctiluca is a diploid protist carrying two complete sets of chromosomes. Option B is the correct answer.
A triploid organism carries three complete sets of chromosomes while a tetraploid organism carries four copies of complete chromosomal set. Options C and D are incorrect.
Therefore, the correct answer is option B.

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