The correct answer is A. The image shows a nuclear fission. This takes place in any of the heavy nuclei after capture of a neutron. This is the opposite of nuclear fusion. In this case, nuclei are broken down into two.
Answer:

Explanation:

As given in the question that methane(
) is taken excess amount
mass of
depend only on mass of fluorine
mass of
=180 g
mole of
=
=9.47
3 mole of
gives 1 mole of 
so 1 mole will give
mole of 
therefore,
9.47 mole of
will give
mole of 

One mole contains 6.022×10^23 actually
They would be neutral if their electonegativity difference was 0