$4-$ There is an error in the following $C++$ code:

int counter $=0$;

do $1$

counter $++$ ;

$$

while $($counter $<mn\; id="EditorElement\_3178357">5</mn><mi\; id="EditorElement\_3178358">)</mi>$

What is the type of this error? Choose the correct answer.

a$.$ syntax

b$.$ logical

How to fix this error? Choose the correct answer.

a$.$ add a semicolon $"$;$"$ after do

b$.$ use a for loop instead of a do$-$while loop

c$.$ add a semicolon $"$;$"$ after the while condition