The meant by the description "antiparallel" regarding the two strands that make up the DNA double helix , the 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand
Chromosomal DNA would be composed of two DNA polymers that together form a double helix, which is a three-dimensional (3D) structure. When the DNA strands are antiparallel, which means the 3' and 5' ends of each DNA strand are parallel to one another.
Two strands of something like the DNA molecule are joined through hydrogen bonds.
Hence, the correct answer will be option (B)
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