The most important step & the only remedy is/ are a free health check up for all the poor patients.
I guess it should be 'is', yet need to get sure. Please help!
And also, could you please tell me what what would be the case if I say-'...free health check ups...'? Should it be 'are' or can 'is' simply work?
Use "is" because your subject is singular (the step). "Important" and "only remedy" both describe that step, they are not two separate things. Also, it does not matter if you say "checkup" or "checkups" because these are the object of the sentence and do not affect the verb.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Use "is" because your subject is singular (the step). "Important" and "only remedy" both describe that step, they are not two separate things. Also, it does not matter if you say "checkup" or "checkups" because these are the object of the sentence and do not affect the verb. You might see this better if you simplified the sentence: The answer is free checkups for everyone.
Clear?