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B
Diploid
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C
Tetraploid
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D
Hexaploid
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Solution
The correct option is D Hexaploid Common wheat (Triticum aestivum), also known as bread wheat, is an allohexaploid (an allopolyploid with six sets of chromosomes, of which two come from Triticum urartu (einkorn wheat) and two from Aegilops speltoides. The last two sets of chromosomes came from Aegilops tauschii. It has 42 chromosomes.