In these lines from Keats 'Ode to a Nightingale'
'The heart aches, and a drowsy numbness pains
My sense as though of hemlock i had drunk Or emptied some dull opiate to the drains one minute past and Lethe-wards had sunk',
the poet uses

• A.alternative rhymes
• B.heroic couplet
• C.bank verse
• D.octosyllabic metre
• E.terza rima.