Polytechnic

Hello Afzal Orawala, this institution was established way back in 1963 and has a very good reputation in Mumbai. It is an autonomous Institute meaning it awards its own diploma and degrees but all these are recognised by government of Maharashtra. This is an establishment that is called as grants in aid meaning many of the expenses incurred like teachers salaries etc are paid by government of Maharashtra and obviously it has to follow in the footsteps of what is applicable for government of Maharashtra establishments importing diploma courses. Admissions in this Institute are given based on the centralised admission process administered by the directory of technical education of Maharashtra government. To help you I am attaching a link that will give you for the and more information about this institution.
https://www.shiksha.com/college/k-j-somaiya-polytechnic-college-vidya-vihar-mumbai-64213
Best wishes to you.

Hello Subha Srinu, I am attaching a link that will give you all the required information about different aspects of this Govt polytechnic at RK Nagar Chennai.
https://www.shiksha.com/college/government-polytechnic-college-r-k-nagar-chennai-98753/courses
It's a good idea to do a diploma in engineering initially after the 10th. Subsequently after three years of the course, one can think of doing graduation in engineering if one so wishes. This way there is no loss of any years for obtaining an engineering degree and in addition, one gets a diploma also and enables one to acquire skills much in demand in any profession. In addition, after completion of a diploma one can pause for a year or two, get the experience of the industry and then proceed to graduation.
Best wishes to you.

According to my opinion, as you have already made up your mind to go for the engineering programme I would suggest you join for Diploma programme and after that, you can go for a lateral entry programme which will be appropriate for you. Here I would recommend to you a university with very good rankings in the education field. LPU is a well-renowned university, providing quality education, innovative pedagogy, and unbeatable placements both national and international. LPU provides great academic exposure to its students. It provides a chance for the students to attend guest lectures or workshops so that they get to learn as much as they can. The students also work on live projects, so that they can apply their knowledge to practical settings. It is one of the few that has embraced international practices when it comes to designing a curriculum. Instead of using old-school books and lectures, LPU has experimented with books, interactive problem-solving interactions, and working through real-world applications. LPU provides ample opportunities to every eligible student to secure good placement with the help of a dedicated Division of Career Services. The university has been ranked high by various outer agencies regarding placements. LPU is conferred with National Employability Award 2020 by Aspiring Minds for the 7th time in a row for having the Most Employable Students and being one of the top colleges and universities in India with one of the highest Employability rates. All the best!