You can recommended below study material for your preparation

Mathematics

RS Aggarwal

Arihant

Legal Aptitude

RK Gupta

English

Arihant

RS Aggarwal

Word Power Made Easy by Normen Lewis

High School English Grammar and Composition by Wren and Martin

Reasoning

Verbal and Non verbal Reasoning by R S Aggarwal

Analytical Reasoning by M K Pandey

General Awareness

Manorama Yearbook

Arihant

You should also refer to previous year papers to understand the exam pattern and level of the questions asked in the exam and solve complete mock test series for your practice.

Good Luck!!