Answer:
carbon, C
Step-by-step explanation:
In order to attract electrons, the atom that combines with iodine should have a high electron affinity. Within the periodic table, electron affinity increases across a period and decreases down a group. Therefore, among B, C and P; Boron (B) is expected to have the least electron affinity, followed by phosphorus (P) and finally carbon (C).
Order of electron affinity:
C > P > B
Therefore, if combined with iodine, carbon will have the greatest attraction for the iodine electrons.