Colleges in Kurukshetra

It is necessary, but not compulsory. You won't get the 20 Marks Internal for each subject via the PCP teachers then. But, you should go once and get yourself registered for PCP. Then you can share your limitations not to come.
The PCP classes to be true have not been attended by all but the Admit Cards do go to everyone.
So, better you decide to attend and participate in Learning to prepare for exams or start preparing yourself. Once you visit then you get help from teachers and see some classmates as well who can share things.

Without doing the Registration of the PCP, it is not possible to get the Roll Number Admit Cards. Once you have to come and mark your Registration for the PCP through the Distance Education Department or the venue of the PCP.
Realistically speaking, you loose the internal assessment out of 20. I mean they will give you marks based on an average of Theory/Written Parler Marks or via any other mean, but the Internal Assessment you can get in PCP.
It is not compulsory to attend classes. You can go and share your limitations and can see if you attend only a few.

Yes, KU is a good university. It provides all knowledge to a student and faculty members are also good. Placements are really good and the packages are very high.

The eligibility criteria of M.Sc geography at DDE KUK is to pass in BA/B.Sc with Geography as one of the subjects or BA (Hons.)/B.Sc (Hons.) in Geography examination of Kurukshetra University OR of any other recognized University. So, B.Tech students are not eligible for this course.

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B.Ed Course Eligibility:
A minimum aggregate score of 50% in graduation is a requisite for admission. A minimum aggregate score of 55% at post-graduate level is mandatory for admission into colleges

The exact date can be checked from the university itself.

The admissions in NITs are done on the basis of ranks secured in the JEE Main exam conducted by NTA. As per the educational criteria, The candidate must have obtained a minimum 75% of marks at 10+2 level, if belongs to the general category. The last year's closing rank at NIT Kurukshetra was 18930 in Mechanical in the female category for the general category. Hence, your rank must be below this for admission.

Yes, you will have to choose a subject in which you want to do LL.M. from distance learning.