3. Don't Point Your Feet at People
Feet are considered to be unclean and therefore it's important to avoid pointing your feet at people, or touching people or objects (particularly books) with your feet or shoes.
If you accidentally do so, you should apologize straight away. Also, note that Indians will often touch their head or eyes as a show of apology. On the other hand, it's a sign of respect to bend down and touch an elder person's feet in India.
4. Don't Eat Food or Pass Objects with Your Left Hand
The left hand is considered to be unclean in India as it's used to perform matters associated with going to the bathroom.Therefore, you should avoid your left hand coming into contact with food or any objects that you pass to people.