Five persons sit between C and L.
H sits third to the right of L.

Two persons sit between C and G, who sits immediate left of K.

K sits third to the left of P, who sits immediate right of D.
Thus, Case 1 and Case 1a get cancelled.

Three persons sit between D and S, who sits immediate left of E.
Only one person sits to the right of S.

The number of persons sitting to the left of L is same as the number of persons sitting to the right of E.

This is the final arrangement.
Three persons sit between G and P.
In the same way, three persons sit between K and C.