B.Tech

Definitely, B.Pharma is a good course to study. It is a medical line which is based on Chemistry. You need to have basic concepts in Chemistry clear. It is nothing but more about Chemistry. It is a very interesting course and you can study many subjects like Pharmacology, Pharmaceutics, Physiology and Anatomy, Pharmacognosy which are non-Chemistry subjects and Pharmaceutical Chemistry, Medicinal Chemistry, Pharmaceutical Analysis which are by name Chemistry subjects.
Food Processing and Technology Engineering branch is a promising one. Unlike the core branches of engineering and other popular branches, Food Processing and Technology is not very popular among students who have passed 12th from Science stream. But it is a good branch that offers decent opportunities and career prospects.
After graduation, students may go for ME/M.Tech programme, which lasts for 2 years. Going for M.Sc programme is another option that is available in front of the graduates. Using these courses, one may specialize in fields such as Dairy Technology, Food Packaging, Food Transportation, Food Storage Engineering, etc.
Going for management courses such as MBA and BMS is also something that graduates may try. It only depends on your area of interest.

None of the branches in this entire world is easy. Every branch has its own fine art. And so is it with ECE, Mech and Civil. But in case you wish to choose among these 3, do try to assess your abilities and then see which branch has your match:
ECE: You will need certain abilities like-
Ability to visualize the electric circuits. Understand the concepts clearly and reason out the working. Programming. Yes, coding. You will need a good grasp on at least C, if not any other. You can learn the language in the first year, so just check whether you can code. Mech/Civil: You will need certain abilities like-
Clear and quick in calculations/mathematics. Visualization.
I may not be able to list all the required abilities. Do try to read articles on the internet. And you always have the first year to develop/enhance your missing skills!
So, assess yourself right. All the best!