Answer:
b. Provisional tic disorder
Step-by-step explanation:
Provisional tic disorder -
It is a type of motor disorder , where there is abnormality and repetition in the vocal cord and there is not proper rhythm.
This disorder is usually seen in children , just before reaching the stage of puberty in the age group of 4 to 6 and is very extreme in the age group 10 to 12.
This disorder is more likely to occur in boys than in girls.
Hence , from the given scenario of the question,
The correct option is b. Provisional tic disorder .