table: 1-10710364-2
columns: Religious group, Population %, Growth (1991–2001), Sex ratio (total), Literacy (%), Work participation (%), Sex ratio (rural), Sex ratio (urban), Sex ratio (child)
Q: What is the lowest child sex ratio in groups where employment is 31.3%?
A: SELECT MIN Sex ratio (child) FROM 1-10710364-2 WHERE Work participation (%) = '31.3%'