Correct option is C
The correct one-word for the given group of words is Kin.
Kin: One’s family, relatives, or blood relations. (रिश्तेदार / कुटुंबी)
Example: After his father’s death, his kin looked after the property.
Meanings of other options:
· (a) Kilt: A knee-length skirt worn by Scottish men (स्कॉटिश स्कर्ट)
· (b) Kindle: To ignite or arouse (उत्तेजित करना, जलाना)
· (d) Kine: Archaic plural of “cow” (गायें)