He is really an obstinate man.

A. considerate

B. friendly

C. understanding

D. compliant

Answer: Option D

Solution(By Examveda Team)

Obstinate : stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so.
Considerate : careful not to inconvenience or harm others.
Friendly : kind and pleasant.
Understanding : the ability to understand something; comprehension.
Compliant : disposed to agree with others or obey rules, especially to an excessive degree; acquiescent.

Antonym of Obstinate is Compliant