Which of the following are conjugated dienes? 
Definitions:
Erect
A posture or position that is upright and vertical, or the state of being physically rigid due to the engorgement of blood vessels.
Maxilla
A pair of bones forming the upper jaw, central portion of the facial skeleton, and part of the roof of the mouth, holding the upper teeth.
Cranium
The skull, especially the part enclosing the brain.
Pectoral Girdle
Site of attachment of the upper limb to the trunk; consists of the scapula and the clavicle; also called shoulder girdle.
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