None the less, (many an old poets, such as Tennyson and Browning, has) kept their romances to the end.
Correct Answer: (a) many old poets, such as Tennyson and Browning, have
Solution:"Subject-Verb Agreement Rule", a singular subject always takes a singular verb and a plural subject always takes a plural verb. In the given sentence, 'poets' is a plural subject that will take 'have' as a plural verb. Hence, 'many old poets, such as Tennyson and Browning, have' is the most appropriate answer.