callous vs. thoughtful

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #673 [color=blue]“Using Adjectives (8)”, question 9

He is not inconsiderate and insensitive. Rather, he is often quite .

(a) despicable
(b) callous
(c) thoughtful

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #673 [color=blue]“Using Adjectives (8)”, answer 9

He is not inconsiderate and insensitive. Rather, he is often quite thoughtful.

Correct answer: (c) thoughtful

Your answer was: [color=red]incorrect
He is not inconsiderate and insensitive. Rather, he is often quite callous.
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In my opinion, the answer is callous. Can you explain clearly for me ? Thanks.

If he were callous then he would be inconsiderate and insensitive. The statement indicates that he is not inconsiderate and insensitive.