If p, q, r are in AP as well as G.P., then which one of the following is correct?

If a,b,c are in A.P. as well as in G.P. then

If a,b,c are in A.P. as well as in G.P. then

If the p^(th), q^(th) and r^(th) terms of a GP. Are again in G.P., then which one of the following is correct?

If 3rd, 8th and 13th terms of a G.P are p ,q and r respectively, then which one of the following is correct? (i) q^(2)=pr (ii) r^(2)=pq (iii) pqr=1 (iv) 2q=p+r

If p ,q ,a n dr are in A.P., then which of the following is/are true? pth, qth, and rth terms of A.P. are in A.P. pth, qth, rth terms of G.P. are in G.P. pth, qth, rth terms of H.P., are in H.P. none of these

If p ,q ,a n dr are in A.P., then which of the following is/are true? pth, qth, and rth terms of A.P. are in A.P. pth, qth, rth terms of G.P. are in G.P. pth, qth, rth terms of H.P., are in H.P. none of these