To select files with extension $.c$ and $.h$, we use the pattern
star dot bracket ch bracket
Here, bracket ch bracket means either $c$ or $h$.
So, it selects files ending with $.c$ and $.h$.
Then, the output is passed to $wc-l$ to count the number of lines.
Therefore, the correct command is:
cat star dot bracket ch bracket pipe wc hyphen l
Online Test Series, Information About Examination,
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Online Test Series, Information About Examination,
Syllabus, Notification
and More.