In icosahedral viruses _______
a. you can calculate the overall number of molecules that make the entire capsid by multiplying The triangulation number (T) by 20.
b. The triangulation number (T) is not relevant to icosahedral shape as it is applied to helical symmetry only.
c. there will always be 12 corners but the number of hexon capsomers increases with the virus particle size
d. capsomers at the 20 corners of the icosahedral structure have a 5 -fold symmetry and interact with six neighboring capsomers.