Read and select the best answer.

In Latin America the way people greet each other can vary region to region, but here are some basic tips:

Friends and relatives greet each other with a kiss or a hug. When a male greets a female or a female greets another female here is what happens. They will gently touch both arms and move together until they are about six inches apart. They put their cheeks together, and make a light kissing sound. Their lips don't ever touch, just their checks. This only takes one or maybe 2 seconds.

When you are invited to someone's home be prepared for a kiss or a hug! If you are unsure at all on what to do when you are in someone's home, the best thing to do is just follow the lead of your host.

In most business situations and greetings, you can generally plan on shaking hands, unless they are a long-time acquaintance or relative.

Source: http://www.spanishprograms.com/spanish-greetings.htm

Based on the reading, what is appropriate in an informal situation when greeting others?

to kiss or hug
to hug
to kiss
to shake hands