Answer:
B- Chromosome
Explanation:
- Chromosome contain the DNA molecule ,that contains all the genetic data of an organism
- There are total 23 sets of chromosome in humans
Explanation of other options:
Tumor
It is any abnormal growth that can be benign or malignant in nature
Helix
It the strand on which is formed by nucleotides of a DNA. DNA has a double helix structure
Nucleotide
The basic unit or building block of DNA ,consists of 3 components
- Sugar
- Base
- Phosphoric acid
