Correct option is C
The correct option to fill in the blank is
(c) after.
Detailed Explanation (English):
• “Take after” means to resemble someone, especially a family member, in looks or behaviour.
• The sentence is about resemblance in looks, so “taken after” is correct.
Correct sentence:
In his looks, he has taken after his father.
Meanings of the other options:
• (a) take for: to mistake someone/something for another (किसी को कुछ समझ लेना/भ्रम होना)
• (b) take up: to start an activity or occupy space/time (शुरू करना / जगह लेना)
• (d) take on: to accept responsibility/work; to face/compete; to employ (जिम्मेदारी लेना / सामना करना / नौकरी पर रखना)