To treat certain forms of cancer, physicians may choose to irradiate the body with high-energy radiation. why does this therapy work?

High-energy radiation (such as that emitted from radioactive materials, or the UV radiation from the sun) has enough energy to form free radicals in cells' DNA.

These free radicals are extremely reactive and lead to changes in the DNA structure. Said changes may thus develop mutations and other complications in cells, causing them to die.

In other words, high-energy radiation has the property of destroying even cancerous cells, due to it affecting their molecular structure.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2