dear student,

you can do phd in english, preferably gain a scholarship to do phd so you will be financially aided.

phd in english takes 3 to 6 years and is very interesting.

you can apply to government post after gaining the phd degree.

the amount or total fee for the course varies from 10,000 to 1 lakh according to the university  under which you are taking the phd degree.

hope it helped.