###Rationale: Ans. is 'b' i.e. Timolol eye drops Timolol maleate is the most widely used drug for open angle glaucoma.It is non-selective B blocker (Blocks both B1 and B2B2 is responsible for bronchodilation, therefore blocking B2 would aggravate asthma.Instead of Timolol, Betaxolol can be used because it is a selective B1 blocker and causes less respiratory side effects.

###Answer: OPTION B IS CORRECT.
###Question: A patient of glaucoma with bronchial asthma presents to the emergency with status asthamaticus, causative agent might have been)
###Options:
A. Pilocarpine eye drop
B. Timolol eye drop
C. Betaxolol eye drop
D. Levobunolol eye drop
