* 괜찮아요 (gwaenchanayo): This is the most common and versatile option. It generally means "okay," "all right," or "fine," often used in response to a question about well-being or a situation. It's polite.
* 괜찮아 (gwaenchanha): This is the informal version of 괜찮아요, used with close friends and family.
* 알겠어요 (algesseoyo): This means "I understand" or "Okay, I got it." It's suitable when someone has explained something or given instructions. Polite form.
* 알겠어 (algesseo): Informal version of 알겠어요.
* 좋아요 (joayo): This means "good" or "okay," often expressing agreement or approval. Polite form.
* 좋아 (joa): Informal version of 좋아요.
The best choice depends on the situation. If you're unsure, 괜찮아요 (gwaenchanayo) is a safe bet in most situations.