The only word that could potentially be a compound noun is patents, but that has its own definition-a government meeting of some sort.
A compound noun would be a compound word that is also a noun, but there aren't really any compound words.
I know this doesn't really help, sry.
Explanation:
Because his dad was having a secondhand car
Answer:
B
Explanation:
when you're constantly being reminded of something by somebody, it gets annoying
Answer:
220 minus age
It should be 60-80 of your maximum heart rate
Explanation: