Hi,

Yes, both the degrees you have mentioned above are different. UG stands for Undergraduate Degree which is also referred to as Bachelor's Degree while PG is Postgraduate Degree otherwise known as Master's Degree. Please specify the name of the exam that you want to apply in 2019 so we may guide you better.

Yes, 

Both undergraduate and postgraduate courses or programmes, subjects etc. But please specify which exam forms do you want to apply for 2019 so that I can provide you with all the details.