[" Which isomer of hexane has only two different sets of "],[" structurally equivalent hydrogen atoms? "]

Which isomer of hexane has only two different sets of structuraly equivalent hydrogen atom?

Which of the following C_6H_6 compounds has a single set of structurally equivalent hydrogen atoms?

Which of the following C_(6)H_(6) compounds has a single set of structurally equivalent hydrogen atoms ? (I)

Which isomer of hexane can give two monochlorinated compounds ?

Hexane has four structural isomers.