The Central Bureau of Investigation sought four days custody of Mukerjea for investigation pertaining to certain financial transactions, including details of bank accounts opened by his wife and co-accused Indrani Mukerjea in Hong Kong besides other issues.
The CBI said it also wanted to ascertain whether Mukerjea gave any deceptive replies during the polygraph test he underwent in New Delhi on November 28.
Strongly opposing further remand, the defence lawyer claimed that Mukerjea had nothing to hide and he had willingly undergone the polygraph test.
The report of the polygraphy test is expected to be received by CBI on Tuesday.
Following the submissions, Metropolitan Magistrate R.V. Adone extended Mukerjea' CBI custody till Tuesday.
Mukerjea was arrested on November 19 from his home in Mumbai and has been in CBI custody since then.
Among other things, the CBI contends that Mukerjea was aware of the killing of Sheena, the daughter of his wife Indrani Mukerjea.
In August, Mumbai police arrested Indrani, her ex-husband Sanjeev Khanna and her former driver Shyamwar Rai in connection with the murder. The three are in CBI custody till December 3.(IANS)