The end of this tight movie is abrupt and looked impractical. Everything was going good until the unveiling of the mask which was a cheap thril. In a classic thriller like this the end should have been better and realistic. A man (Rani's husband) who can't speak good hindi becomes a lawyer with perfect hindi? Not realistic, not digestible. A better twist at the climax would have been by disclosing Amitabh as Rani's ex husband and real father of dead son, enters as lawyer keeping the real lawyer as keptive for few hours hidden some where else and appears at the end the way it was shown.
This would have been more realistic and thrilling.