|Direction: Complete the series by choosing is correct option.|
Correct Answer: C
Solution :First letter of each term is moved 2 steps forward, third letter one steps back ward and middle term is \[1\times 1+1=2,\] \[2\times 2+2=6,\] \[6\times 3+3=21,\] \[21\times 4+4=88\]
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