Answer:
Hydrogen
Explanation:
Hydrogen can never be central atom despite its low electronegativity
1.6456 x 10^3 (ten to the third power)
Found the choices. Pls see attachment.
The statements that explains this phenomenon are:
1) DNA contains adenine as one of its nitrogenous bases.
2) DNA has a double-stranded structure that ensures an accurate mechanism of duplication.