1) 2, A, 9, B, 6, C, 13, D, ? A) 9 B) 10 C) 12 D) 19 Answer: Option BExplanation:The given sequence is a combination of two series : l. 2, 9, 6, 13, ? and II. A, B, C, D The pattern in I is : $2+7\rightarrow 9, 9-3\rightarrow 6, 6+7\rightarrow 13, 13-3\rightarrow 10$ So the missing term is 10.