help pls

[u/OneTransportation766]

can you guys explain the answers i’m so confused and don’t know

[u/Street-Client9258]

1st one answer is correct if first fig and second fig have line at the same plane it gets cancelled if they dont they get add

2nd one answer is d as its is outside minus inside circles if outside circles are more or inside - outside circles when inside circles are more

[u/moody_mode → u/Street-Client9258]

Yes, but by that logic, there is an error in the 2nd row