The correct option is
A Teeth
The adjective, 'even' means 'flat and smooth'. It also means 'equal in number, amount, or value' or 'equally spaced and in same size'. This adjective is usually used along with the following nouns: 'teeth', 'space', 'surface', 'contest', 'numbers' and 'temperament'. Hence, option A is correct.
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'. Some adjectives which can be used with 'eyes' are: 'beady', 'gleaming', 'twinkling', 'hollow', 'blood-shot' and 'sallow'. However, 'even' is not an adjective which can be used to describe any of the above three nouns. Given the above, options B, C and D are incorrect.