Correct option is A
The logical sequence is:
The sentence begins with
"Till a few years back, I used" to introduce the context.
Next comes
"to admire at the great and insightful language used in" to elaborate what the admiration was for.
"Some of the judgements of the higher judiciary, where law" logically follows to specify the source of the language.
Finally,
"used to intermingle with literature and humanism" completes the thought by describing the unique quality of the judgements.
Hence, ' ' is the correct answer.