Final answer:
The person who is opposite Hema at the round table is Lokesh.
Step-by-step explanation:
To determine who is opposite Hema at the round table, we need to keep track of the given conditions. Firstly, Amit is not next to either Hema or Chanchal, so Amit cannot be opposite Hema. Secondly, Priya is not next to Lokesh, so Priya cannot be opposite Hema. Lastly, Divya has Hema sitting between her, which means Divya cannot be opposite Hema either. Therefore, the only remaining option is Lokesh, making Lokesh the person who is opposite Hema.