The endosperm of Brassica campestris is
-
haploid
-
diploid
-
triploid
-
tetraploid
C
Correct answer
Explanation
In Brassica campestris (mustard plant) and most angiosperms, the endosperm is triploid (3n). This results from double fertilization, where one sperm fertilizes the egg (forming a 2n zygote) and the second sperm fuses with the two polar nuclei (each n), creating a 3n endosperm that provides nutrition to the developing embryo.