High-profile Samajwadi Party spokesperson Amar Singh today resigned as its General Secretary and other posts following deepening differences with party chief Mulayam Singh Yadav. Mr Singh, who is in Dubai, faxed his resignation also from Party parliamentary board to Mr Yadav, saying his priority now is his health, wife and children. The 53-year-old leader, who was considered the right hand man of Mulayam Singh Yadav, insisted that there is no political motive behind his resignation but appeared bitter about the party. <br/><br/>After the kidney transplant he underwent in Singapore three months back, he said, the resignation is strictly as per the advice of the doctors. Mr Singh, who had attacked Mulayam Singh and his family over the party's humiliating defeat in the Lok Sabha by election in Firozabad in November, maintained that he is not quitting active politics.