Which of the following structures is consistent with the mass spectrum shown below? 
Definitions:
Patentable Invention
An invention that meets specific legal criteria to be protected by a patent, preventing others from making, using, or selling the invention without permission.
New and Useful Machine
An invention that offers a novel and functional solution or improvement to a particular problem or need.
Scientific Principle
A fundamental concept or law that guides scientific work and is widely accepted as true based on evidence.
Innovation
The introduction of something new, such as an idea, method, or device.
Q12: Provide the major organic product in the
Q43: Which of the labeled H atoms (1
Q44: According to the 1,3-butadiene structure below, which
Q45: How many pairs of degenerate π molecular
Q66: Provide the structure of the major organic
Q70: Which undergoes dehydration using concentrated H<sub>2</sub>SO<sub>4</sub> faster,
Q74: Show the best method for preparing methoxycyclopentane
Q79: The protons marked H<sub>a</sub> and H<sub>b</sub> in
Q108: What three-word term is abbreviated NMR?
Q129: What multiplicities are observed for the signals