Please be careful of bad advice. If they are friends in India whose visa was denied, they are just envious. If they are friends in the US, then they don't know the rules well enough. Either way, anyone giving you such advice needs to understand that if you did go the embassy and apply for a visa second time (drop box or in-person) and it was denied, then the denial will have legal superiority over all other approvals on file. I am very happy that you thought of asking the question here. Have a safe trip to the United States!