• From the given options, worm gear is used for transmitting power in non-parallel and non-intersecting shaft.
• Helical gear and Herringbone gears are used to transmit power in parallel shafts.
• A hypoid gear is used to transmit power non-parallel intersecting shafts.

Helical gear :

• It is similar to spur gears but its teeth are cut at an angle which is called as helix angle with the axis of rotation of the gear.
• Two such gears may be used to connect two parallel shafts in place of spur gear.
• The helixes may be right handed on one wheel and left handed on the other.

Double helical (Herring-bone) gears :

• These gears are formed by joining two helical gears of identical pitch but of opposite hand.
• The axial thrust of these two gears act in opposite direction, therefore, the effect of axial thrust is nullified and shaft is free from any axial force.

Worm gears :

Hypoid gear :

• It is similar to the spiral bevel gear and is used to connect non parallel but intersecting shafts.

Hence, the correct option is (C)