In which one of the following four-stroke cylinder arrangements will the intake and exhaust valves open downward into the combustion chamber?
a. k-type
b. c-type
c. t-type
d. i-type

The  cylinder arrangements that will do the job is: D. I-type 

In the i-type cylinder arrangement,  the intake and exhaust valves  are positioned vertically at the top of the cylinder head, and both valves will move downward for the combustion chamber to open.
We could see this type of cylinder arrangement on many automobiles product