The social groups that he mentions are Hindus and Muslims. Yes, these groups were easily identifiable by their dressing, tradition, culture, etc. For instance, Kalam used to wear a cap on his head which identified him as a Muslim. Ramanadha Sastry wore a sacred thread.
(i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)
ABCD is a quadrilateral in which AD = BC and ∠ DAB = ∠ CBA (see Fig. 7.17). Prove that
(i) ∆ ABD ≅ ∆ BAC
(ii) BD = AC
(iii) ∠ ABD = ∠ BAC.
