Jawaban:

1. Good” is the most common answer to the question “How are you?" (It is polite and cheerful. Well or very well: This answer is the most grammatically correct since the question "How are you?” should technically be answered with an adverb.)

2. I'm OK. Not too bad. Same old, same old. Yeah, all right.

3. “Good morning to you too” (if your relationship is of a informal nature and the closeness between you. You may also add something like 'So what's up for the day and continue the conversation to a comfortable time zone. In formal cases, it would be ideal for you to say “Thank you and wishing you the same.)

4. "It's a pleasure meeting you as well" (The most common way to reply is with "Nice to meet you too." When responding to "Nice to meet you", you can reply formally )

5. very well, thank you'/'fine, thanks. ('How do you do ? ' is a slightly formal form of greeting extended to someone, encountered for the first time on a particular day. There is no 'correct response', as such, but a generally accepted response would be )