By B.C. Thimmaiah Going on group journeys on motorbikes to explore unexplored places is commonplace but a solo ride along India’s borders, covering 21,000 kilometres without touching any metro city, that too on a 33-year-old bike,  is commendable. The feat has been accomplished by a 44-year-old Mysuru-born rider Sandeep N. Ananthaprakash, presently a resident of…