C Programming
The output of the following program is:#define f(g,g2) g##g2void main(){ int var12=100; printf("%d", f(var,12));}

Runtime error
10012
Syntax error
100
g##g2

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C Programming
String concatenation means -

Extracting a substring out of a string.
Merging two strings.
Combining two strings.
Comparing the two strings to define the larger one.
Partitioning the string into two strings.

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