J Sainsbury's, Britain's third-largest supermarket group, is considering selling its pension scheme.The supermarket chain has gathered quotes from some buyout groups regarding the £2bn final salary scheme.It was Sainsbury's pension scheme that is believed to have caused Qatar Investment Authority’s (QIA) £10.5bn takeover offer to fail last year. It has been suggested that the supermarket chain will attract more interest if it goes ahead with the pension scheme sale.