Hello aspirant,
Pharm D(6 years long course): Science stream students (any group- Mathematics or Biology), who have passed 10+2 board examination from a recognized board OR Diploma in Pharmacy holders (from a PCI recognized institute) are eligible to pursue this course. Some institutes do have the minimum marks criteria.
According to this criteria, a student must have scored at least 50% marks in Physics, Chemistry and Optional subject (Mathematics/Biology) in 12th board examination.
Admission usually takes place through State wise/Central Medical Admission authority. It is based onmeritmarks. Marks scored by a student in State/all India level entrance test (depending upon the type of institute you want admission in) and12th Scienceboard examination are taken into consideration. Based on these marks, a merit list is made. Seats will be allotted to deserving students, based on the merit list.
All the best.