Corneal ulcer is characterized by acute pain, redness, lacrimation (watering), and blepharospasm (spasm of eyelids).
These occur due to intense inflammation and irritation of the corneal nerves.
However, muco purulent discharge is typically a sign of conjunctivitis, not a classic feature of corneal ulcer.
In corneal ulcer, discharge is usually watery or serous rather than purulent unless there is secondary infection.
Therefore, the correct answer is B only.