B.A Sociology

You are looking for two different subjects of two different degrees. While landscape archeology is a subject in B.Arch. the criminology is subject in B.A. Criminology. There are 48 colleges in India that offer Masters in archeology, including Guru Gobind Singh Indraprastha University, Delhi.
Post graduation in Archaeology is mainly done through entrance exams. Candidates need to have completed their Bachelors in a computer subject along with 50% marked to be eligible for master archaeology course. Some colleges offer direct admission on the criteria of merit. Since you already have B.A. Degree with good GPA, you can easily get admission in Master degree in either subjects.