Which of the following elements should come in a place of ‘?’
NO4Â Â Â Â Â Â PM6 Â Â Â Â RK8 Â Â Â Â Â Â ?
N + 2 = P; P + 2 = 2 = R; R + 2 = T O – 2 = M; M – 2 = K; K – 2 = I 4 + 2 = 6; 6 + 2 = 8; 8 + 2 = 10
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