which one is better doing diploma in journalism and mass communication after 12 or doing bachelor's in journalism and mass communication?

If you are passionate about the career in this field, and want deeper knowledge and skills, along with good placement opportunities, the go in for degree from a reputed university like LPU.

As degree involves deeper study, internships, practical exposure and longer duration to prepare you for his highly competitive industry.

The surety of program outcomes like following makes LPU a prefered choice:

• Communication : Demonstrate capacity to clearly communicate ideas and emotions orally and in writing
• Media Law and Ethics : Undertake professional work in accordance with prevailing laws and established ethics and norms of the media and entertainment industry.
• Dexterity with journalism apparatus : apply tools, technologies and software appropriate for a mass communications professional.
• Leadership and team-spirit : Demonstrate leadership, team-spirit and organizing ability in Film and TV productions.
• Life-long learning : Curiosity and perseverance to keep updated with evolving technologies and practices.
• Analysis and creativity : Demonstrate capacity to analyze various dimensions and consequences of events and issues and present them in a creative manner.
• Application of media concepts and research tools effectively and efficiently to handle various assignments in the world of mass media
• Research, analyze and interpret data for the construction of media messages.

Thanks

The main question arises here is your need ie. You want skill or you want degree.
A degree is always a cut above on diploma.

One of the biggest differences between a degree, certificate, and Diploma is the time it takes to earn them. A degree comes in many forms and takes the longest to complete. It can be an associates, bachelors, masters, or even a doctorate. A degree can take anywhere from two to four years or longer.

Certificate programs often take months instead of years, and some can even be obtained in conjunction with a degree program. Diploma programs offer a more in-depth curriculum than a certificate, but they are more like a certificate than a degree.

Also with a good degree you have higher chances of earning more as compared with a diploma .
So if you want to do diploma then do persue it as a additional supplement to your CV with a degree program.

I hope this helps.
Regards
Madhur