Utilize the input text as a context reference, choose the right relationship between 'Arundhati Bhattacharya' and 'chairperson' from the options.
Options: business division, chief executive officer, original broadcaster, position held

And, as soon as this corporate internet banking comes on mobile, we will catch with the number," Bank's chairperson Arundhati Bhattacharya had told reporters.
position held