The series is as follows; V, VIII, XI, XIV, _?_, XX What number should fill the blank?

Question

Which set of numbers would most logically fill in the blanks in the following series?
101, 99, 102, 98, 103, 97, _ , _ ,105, 95, 104, 94
(a) 101 98
(b) 104 96
(c) 106 99
(d) none of these

Please provide your reasoning also?

Answer 1

Answer --XVII
Series is 5,8,11,14,?,20

Common difference -- 3

Hence 14+3=17

Answer is 17-XVII

Answer 2

XVII is the answer, Roman Numerals -> numbers

2, 5, 8, 11, 14, __17__, 20, 23, 26, 29, 32, 35, 38... (i just extended it)