Correct option is C
Logic: The number of letters in the word plus 3.
SIXTEEN has 7 letters.
7 + 3 = 10, so SIXTEEN is coded as 10.
NINE has 4 letters.
4 + 3 = 7, so NINE is coded as 7.
Now, for EIGHT:
EIGHT has 5 letters.
5 + 3 = 8, so EIGHT will be coded as 8.
Correct Answer: (c) 8