Answer: Option (c) is the correct answer.
Step-by-step explanation:
Atomic number of fluorine is 9 and its electronic distribution is 2, 7. Whereas atomic number of iodine is 53 and it also contains 7 valence electrons. Therefore, it is known that elements with same number of valence electrons belong to same group as they tend to show similar chemical properties.
Whereas sulfur is a group 16 element and contains 6 valence electrons. Neon is a group 18 element and contains 8 valence electrons. Since, the valence shell of neon is completely filled so it will not react easily.
Out of fluorine and iodine the electronegativity of fluorine is more than that of iodine. Hence, fluorine will readily accept an electron from another atom.
Therefore, we can conclude that fluorine (F) element is Sonya most likely studying.