As you want to get the detail that is NATA is the only entrance exam to get admission in B.Arch so here is the information of the same for you:

I want to tell you that no NATA is not the only entrance exam to get admission in B.Arch

There are several other entrance exams to get admission in B.Arch and they are as follows:

Aligarh Muslim University B.Arch Entrance Examination

Andhra University College of Engineering Entrance Examination

Annamalai University Engineering Entrance Examination

BITSAT or Birla Institute of Technology and Sciences Admission Test

BS Abdur Rahman University B.Arch Entrance Examination

CEED or Common Entrance Examination for Design

Dr.D.Y. Patil Institute All India Entrance Test

Guru Gobind Singh Indraprastha University B.Arch Entrance Examination

Hindustan University Engineering Entrance Examination

IITJEE. or Indian Institute of Technology Joint Entrance Examination

JNTUPA. CET or Jawaharlal Nehru Technological University Planning and Architecture
Common Entrance Test

JNUEEE. or Jawaharlal Nehru University Engineering Entrance Examination

Kalinga Institute of Industrial Technology Entrance Examination

Karnataka State Common Entrance Test

Karunya University Entrance Examination

M.T.U.S.E.E. or Mahamaya Technical University Entrance Examination

AIEEE

SLIET Entrance Test or State Engineering Entrance Examination

S.R.M.E.E.E. or S.R.M. Engineering Entrance Examination

T.N.P.C.E.E. or Tamil Nadu Professional Courses Entrance Examination

Vellore Institute of Technology Engineering Entrance Examination

Vinayaka Missions University Engineering Entrance Examination