Which of the following is Autotriploid?

Solution (By Examveda Team)

Cynodon dactylon is Autotriploid.
An autotriploid would have three copies of the basic chromosomal set. One way to produce an autotriploid is by mating a diploid with a haploid (n) gamete and a tetraploid with a 2n gamete. The offspring would have unbalanced gametes and therefore possibly be sterile.
Autotriploids have three chromosome sets derived from a single taxon, and cyanadon has the same.