CGPSC 2012 · Question 49 of 66
Mental Ability
Letter positions are 4,13,22,6,16,26,8,19 with steps +9,+9,-16,+10,+10,-18,+11; the next step +11 gives position 30, i.e. 4 = D.
Source: CGPSC Prelims 2012 GS Paper-II (held 9-6-2013), solved paper
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