It is mentioned in the passage that many gestures .

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
If you want to give someone the nod in Bulgaria, you have to nod your head to say “no” and shake it to say “yes” – the exact opposite of what we do! In Belgium, pointing with your index finger or snapping your fingers at someone is very rude.
In France, you shouldn't rest your feet on tables or chairs. Speaking to someone with your hands in your pockets will only make matters worse. In the Middle East, you should never show the soles of your feet or shoes to others as it will be seen as a grave insult. When eating, only use your right hand because they use their left hands when going to the bathroom.
In Bangladesh, the 'thumbs-up' is a rude sign. In Myanmar, people greet each other by clapping, and in India, whistling in public is considered rude.
In Japan, you should not blow your nose in public, but you can burp at the end of a meal to show that you have enjoyed it. The 'OK' sign (thumb and index finger forming a circle) means "everything is good” in the West, but in China it means nothing or zero. In Japan, it means money, and in the Middle East, it is a rude gesture.