With which State Mizoram does not share a border?

The  Pravasi Bharatiya Divas (PBD) is observed in __________

Which of the following is also called Marsh Gas?  

As the frequency of a wave increases, what happens to its wavelength? 

Atomic weight of an element is compared with which of the following to get the atomic weight of that element? 

Science of the study of preserved remains or traces of animals, plants, and other organisms from the remote past is called ________.

A seven-sided polygon is called ______

Who is believed to have built the Konark Temple?