SSC CHSL 2025 PYQ — Question 41

Given series aab _ ccaa _ bbbcccaaa _ bbbbcc _ c

Observe the pattern (mechanism) Letters a, b, c repeat in groups, and their frequency increases step by step.

First level: letters appear 2 times → a² b² c²

Second level: letters appear 3 times → a³ b³ c³

Third level: letters appear 4 times → a⁴ b⁴ c⁴

So, the series is moving toward equal groups of a, b, c.

Fill the blanks Insert ‘baac’ Series becomes: aabbccaaabbbcccaaaabbbbcccc

Now we clearly get the groups: aa bb cc (2 times) aaa bbb ccc (3 times) aaaa bbbb cccc (4 times) Thus the group pattern is completed correctly.

Hence, the correct answer is option (1).