Question

If you have to do something it isc________y​

Answer 1

Ответ:

1)if you have to do something it is compulsory

Answer 2

It seems like there might be a word missing in your sentence. It could be something like "If you have to do something, it is necessary," or "If you have to do something, it is compulsory." Could you please clarify your question or provide more context?