Options:
A.
B.
C.
D.
E.
Sign in to view the correct answer and detailed explanation.
Study with fewer interruptions on Android
Use Ulearngo on a verified device for smoother past-question study.
Ulearngo is an independent study app. It is not affiliated with, endorsed by, or representing National Examinations Council (NECO). Always confirm official exam, admission, registration, syllabus, timetable, and result information from NECO official website.
Earlier discussion
1 older comment kept for context.
Mohammed Ibrahim
I think the right answer supposed to be in group 7 since we all know that flourine is element 9 in the periodic table