Final answer:
a) IM 101. The correct answer is IM 101, which refers to the design of aboveground vertical tanks with external piping and a manhole on top.
Step-by-step explanation:
The correct answer option for this question is IM 101. In engineering, IM refers to Industrial Machinery, and the numbers following IM represent specific codes or standards. IM 101 pertains to the design of aboveground vertical tanks, often used for storing liquids. The piping for an IM 101 tank is typically located outside the tank, usually at the ends, and it may have a manhole on top of the tank for access.