It is not advisable to publicly express strong political views or to take part in political demonstrationsin India. Avoid demonstrations and public gatherings, which can sometimes turn confrontational and stay away from military sites – taking photos of, or near, military or security installations, and some public buildings, may be prohibited.
Although the threat from terrorism in Vietnam is low, there is still a global risk of indiscriminate terrorist attacks, which could be against civilian targets, including places frequented by tourists and expatriates.
Petty Crime is common in India, particularly in urban areas, you should take sensible precautions at all times and especially during the summer peak travel period;
For More information Click Here the link Visa Status for e-approval letter required for on arrival visa in India.