According to IS : 6509 - 1985, for reinforced concrete slabs of thickness 25 cm, with expansion joints and dummy contraction joints, the recommended maximum spacing of expansion (E) and contraction (C) joints are : (codes E and C used to indicate type of joints in answer options)
1
E - 36 m ; C - 4 m
2
E - 30 m ; C - 7.5 m
3
E - 51 m ; C - 17 m
4
E - 27 m ; C - 4.5 m