He is quite meticulous in his dealings with others.

A. reserved

B. haughty

C. indifferent

D. careful

Answer: Option D

Solution(By Examveda Team)

Reserved : slow to reveal emotion or opinions.
Haughty : arrogantly superior and disdainful.
Indifferent : having no particular interest or sympathy; unconcerned.
Careful : making sure of avoiding potential danger, mishap, or harm; cautious.
Meticulous : showing great attention to detail; very careful and precise.

Synonym of Meticulous is Careful