###Answer: OPTION D IS CORRECT.
###Question: An old patient Ram Kishore having asthma and glaucoma is to receive a β blocker. Regarding β blocking drugs:
###Options:
A. Metoprolol blocks β2 receptors selectively
B. Esmolol's pharmacokinetics are compatible with chronic topical use
C. Nadolol lacks β2 blocking action
D. Timolol lacks the local anaesthetic effects of propranolol
