His visit to foreign countries brought about a sea change in his outlook and his attitude to the people.

A. favourable

B. transformation

C. unfavourable

D. partial

Answer: Option B

Solution(By Examveda Team)

Favourable : expressing approval.
Transformation : a marked change in form, nature, or appearance.
Unfavourable : expressing or showing a lack of approval or support.
Partial : existing only in part; incomplete.
Sea change : a profound or notable transformation.

Synonym of Sea change is Transformation