The most superior part of the spinal cord is the foramen
magnum. This is considered to be the largest foramen in an individual’s skull
and that it is also responsible for having to connect or link the brain and the
spinal cord.

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Answer:
Examples of fission and fusion
For example, the so-called hydrogen bomb (or H bomb) is actually a deuterium–tritium bomb (a D–T bomb), which uses a nuclear fission reaction to create the very high temperatures needed to initiate fusion of solid lithium deuteride (6LiD), which releases neutrons that then react with 6Li, producing tritium.
Explanation:
Given :
A horticulturist is planting a garden that is 4 m x 20 m.
To Find :
Dimensions could she use to create a scale model to plan it.
Solution :
Ratio of dimensions is :

Now , options with same ratio will be useful to make scale diagram :
a) 4/1 = 4
b) 200/40 = 5
c) 5/1 = 5
d) 4/2 = 2
Therefore, options b) and c) are useful to make scale diagram.
Hence, this is the required solution.