B ia the correct one .
Hydrogen only uses the first energy shell, which holds 2 electrons, not 8.
The answer is (2) A bond is formed and energy is released. The left side of equation is I atom and the right side of equation is I2 molecule. So the bond is formed between I atom to form I2 molecule. And forming bond will release energy while breaking bond will absorb energy.
Answer:
covalent bonds............