Ratio of number of rods to the number of cones is _______
A. 1:20
B. 1:2
C. 1:1
D. 1:5
Answer:A
Ratio of number of rods to the number of cones is _______
A. 1:20 B. 1:2 C. 1:1 D. 1:5
Explanation: No of rods: 6 to 7 million, No of rods: 75 to 150.