The correct option is B 21
Root cells
Root cells are the somatic cells. The root cell of wheat has 42
chromosomes.
Synergid cells
Synergids are haploid cells present in the female gametophyte or embryo sac of angiosperms. Thus the synergids of wheat will have half the number of chromosomes compared to the root cells, i.e., 21 chromosomes.
Final answer
c. 21.