Elitmus Exam Numerical Ability

G1,G2,G3,G4 are in G.P, where G=G1 and R is the common ration and log4(G1)+log4 G2 +log4 G3 +.... = 2500, then find the possible pair of (G,R).
A.
(G,R)=[ 21250/R(3/2) , R]
B.
(G,R)=[ 21250/R(1/2) , R]
C.
(G,R)=[ 21250/R(3/4) , R]
D.
(G,R)=[ 21250/R(3/7) , R]

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