The correct option is
D Complexion
The adjective, 'swarthy' means 'having dark skin'. The word, 'complexion' means 'the natural colour, texture, and appearance of a person's skin, especially of the face'. Hence, this adjective is most suitable to describe the noun, 'complexion'. Option D is correct.
Some adjectives which can be used with 'eyes' are: 'beady', 'gleaming', 'twinkling' , 'hollow', 'blood-shot' and 'sallow'. Some adjectives which can be used with 'hair' are: 'luxuriant', 'glossy', 'bouncy', 'untidy' and 'dishevelled'. Some adjectives which can be used with 'lips' are: 'full', 'attractive', 'luscious, 'plump', 'rosy', and 'puckered up'. However, 'swarthy' is not an adjective which can be used to describe any of the above three nouns.
Given the above, options A, B and C are incorrect.