there are altogether five books on the desk---- two are mineA on which B in which C of which D from which 要解析

there are altogether five books on the desk---- two are mineA on which B in which C of which D from which 要解析
there are altogether five books on the desk---- two are mine
A on which B in which C of which D from which
要解析

there are altogether five books on the desk---- two are mineA on which B in which C of which D from which 要解析
C