Select the grammatically correct form of the following sentence from the options below:
I'm not sure what to do, as I've never encounter a problem like this before.
1
I'm not sure what to do, as I've never encountered a problem like this before.
2
I'm not sure what to do, as I never encounter problem like this before.
3
I'm not sure what to do, as I've never encountered a problem liked this before.
4
No error in the given sentence