The correct option is A 8 inches, 6 inches
Length of yellow crayon = 10 inches
The length of the red crayon is a little less than the yellow one.
So, estimated length of red crayon = 8 inches
Length of blue crayon = 5 inches
The length of the pink crayon is slightly more than the blue one.
So, estimated length of pink crayon = 6 inches
Hence, the estimated length of the red and pink crayon is 8 inches and 6 inches, respectively.