Select the most appropriate meaning of the idiom given below:
Straight from the horse's mouth

Correct option is B

Option (b) is the correct meaning of the given idiom.
Idiom: Straight from the horse’s mouth
Meaning: It means to receive information directly from the most reliable or original source, especially someone involved in the matter.
Example: I heard about the merger straight from the horse’s mouth – the CEO told me himself.
Other related idioms:
· From the ground up – from the beginning.
· First-hand information – directly from experience or observation.