Bachelors

It all depends upon time management. Preparation can be of three types: self, self plus coaching, coaching. It depends on whether you are a working professional or a student. So, if you are working you have to prepare either by self-using the correspondence booklets or you can take the option of taking weekend coaching classes. Also, you can buy some famous books used for the preparation of MBA entrance exams. But if you are a student then you have a good amount of time to prepare. So you can use the correspondence course and books initially for self-preparation and later can join coaching classes for brushing up your preparation with added techniques. So, any MBA entrance exam has generally three sections- quantitative aptitude, logical reasoning & data interpretation and verbal reasoning along with the study of general current affairs. So, depending on your strengths, weakness and speed, prepare the three sections accordingly and nail the exam.

See these both are very different fields, one is for managing business administration, whereas, another is in media and journalism world. Both have got a very deep need in this world. One connects the world by imparting news around the globe, whereas, another connects to the world with there effective products and services to every part possible.
Nowadays, as media has diverse fields like radio, print media, TV, and others with much tough competition, where you need much art in your hands (Pen) and words. So, to go in this field, you need to have skills.
1. Writing power
2. Speaking art
3. Patience
4. Calmness
5. Great interest
It has a good scope if you have interest.
Whereas, in management also you have great and increasing demand as, nowadays, startups are increasing with requirements of skilled professional managers to take their business to great heights. For this, you need to have
1. Brain twisting (situational)
2. Communication skill
3. Patience
4. Risk taking heart
5. Cooperative nature
I will just suggest better than thinking too much, think that which course you got much interest in and from which you can achieve better scope.
Hope you got your answer.
All the best.

There are many top online platform for preparing of the candidate for the NMAT some of them are as follows:-
1-careeerlauncher online platform:-Night Classes offer 12+ live, interactive, online sessions specific for NMAT preparation. The sessions are taken by the experts across India and each session is for 90-120 minutes.
2-myprivatetutor.com-With your requirement a Private tutor will be arranged for your desire course as per your convenience
3-examvictor.com-Our flagship offering at ExamVictor.com is a full-length MBA Entrance Exam preparation course. We pride ourselves in the quality of our content and superiority of our faculty. Each and every piece of content is personally created and vetted by Vivek, an IIT Bombay and IIM Ahmedabad grad.
4-Time for education
5-testfunda.com
6-urbanpro.com
7-catking.com
These are various platform for studying online
Hope this information helps.
All the best.