I would have to go with A
A molecule is a group of bonded atoms. Answer a, b, and c all have molecules. For example H2O has the molecule H2 in it. The only compound that doesn't share this trait is answer d: NaCl.
Answer – Chromosome
In eukaryotic nuclei, DNA and proteins are packaged into organized cellular structures known as Chromosomes. Genetic material is housed in the nucleus where is it tightly packed into linear chromosomes. Chromosomes consist of a complex of DNA and protein which is known as chromatin. Chromatins are organized into subunits called nucleosomes
According to the equation the correct answer with the interval registered in minutes is: C
8=0.00146 (distance to epicentre) <=> distance to epicentre=8÷0.00146 <=>5479,45 km