Hey Abhay,
Bachelor in Pharmacy is a 4-year undergraduate degree course in medical and health care field.
The eligibility for admission to this course says that you must have minimum 17 years of age and maximum  23 years on or before 31st December of the year of admission.
And you will attain 17 years age in 2020, so you will be eligible for taking admission in year 2020.
Other Eligibility Criterias are :

• You must have passed 12th examinations with Physics, Chemistry and Biology /Biotechnology /Mathematics/Computer science as compulsory subjects
• You must have scored minimum 50% marks in the examinations.

Good Luck!