The ph of milk is 6.4 based on this information which if the folloeing statements best describes milk? a. it is very basicb. it is very basicc. it is slightly basicd. it is slightly acidic

PH scale is used to determine how acidic a solution is. 
if pH value is less than 7 then solution is acidic 
if pH = 7 then solution is neutral
and if pH is greater than 7 then solution is basic 
pH of solution is 6.24
so if we take pH values from 1 to 7, with 1 being very acidic and 7 being neutral, pH value 6.24 lies within this range being closer to 7, the neutral value
this means that solution is slightly acidic.

answer is D. it is slightly acidic  

Yes i think so not 100 percent sure though