Of the three blood types of alleles which one is recessive to the other two?

B
O
A

Which one

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added

d. cellulose and starch