A 29yo woman who was dx to have migraine presents with severe onset of occipital headache

A 29yo woman who was dx to have migraine presents with severe onset of occipital headache.
She lost her consciousness. CT=normal. Neurological exam=normal. What is the most
appropriate management?
a. Repeat CT
b. MRI c. LP
d. XR
e. No inv required

Q. 1. What is the key?
Q. 2. What is the diagnosis?
Q. 3. What are the points in favour?

Ans. 1. The key is E. No investigation required.
Ans. 2. The diagnosis is basilar migraine.
Ans. 3. Points in favour i) history of migraine ii) severe occipital headache iii) LOC iv) CT normal v) neurological examination is normal.