in jee paper 2 how do I preparation for art?

Syllabus for drawing test are as follows-

Drawing and designing of geometrical or abstract shapes and patterns in pencil, Transformation of forms both 2 D and 3 D union, Elevations and 3 D views of objects Rotation, Development of surfaces and volumes, Generation of Plan, Creating 2D and 3D compositions using given shapes and forms, Sketching of activities from memory of urban scenes (public space, festivals, market, street scenes, recreational spaces monuments, etc.), landscape (gardens, trees, river fronts, jungles, plants etc.) and rural life.

You can refer below books for your preparation-

1- A Complete Self Study Guide for B.Arch 2015 Entrance Examination (English) by P.K Mishra, Arihant Publications.

2- Architecture Entrance Book by P.K. Mishra.