The young man appears to be quite headstrong.

A. thick-headed

B. obstinate

C. robust

D. witty

Answer: Option B

Solution(By Examveda Team)

thick-headed : unintelligent; stupid.
obstinate : strong-willed.
robust : strong and healthy; vigorous.
witty : showing or characterized by quick and inventive verbal humour.
headstrong : energetically wilful and determined.


Synonym of headstrong is obstinate