With each set of elements and their electronegativities, determine if the electrons will be shared equally (non-polar, NPC) or unequally (polar, PC) between the two atoms when they bond together. For polar bonds, use 8* or 8 to
indicate the resulting slightly positive and slightly negative atoms, respectively. Then, use an arrow (+-> or <--+)
above the bond to show the resulting direction of polarity in each bond.
1. C-0
5. P-Br
9. C-H
2. N-C
6. P-C1
10. SO
3. 00
7. F_F
11. C-Br
4. BS
8. I-B
12. H-H

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

the answer would be a