Answer:
A chromosome abnormality, chromosomal anomaly, chromosomal aberration, chromosomal mutation, or chromosomal disorder, is a missing, extra, or irregular portion of chromosomal DNA.
(a) Deletion (b) duplication (c) inversion and (d) translocation.
It belongs to a class of molecules called the nucleic acids.
I believe the ratio of C to H to O in simple sugars or monosaccharides are 1 C : 2 H : 1 O or 1:2:1.
Letter A is the answer.
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